first, every kid is different. hawk has a nice long lead before poops. he also likes to take his time pooping. he takes after me in that way. LOL
so, when he signalled, i knew that we had a good amount of time at the first signal, which is when i started the dialogue about going. once we got all fo the "no", hawk's signals were getting more urgent, and i tried to explain to him that we couldn't go there. and then, he tried to go himself, and i did try to stop him. after all, it got all over his pants because i pulled them back up after he managed to get them half down.
it was like a comedy of errors, and if some of you can't see that and feel indignant or something, then obviously we don't share a similar humor.
beyond this, i'll tell you more pooping in security stories.
at SFO, we got bumped from WEd to Fri for our flight. SO, we'd gone through security to go to our gate only to be turned back.
that security run was very similar to Philly in a lot of ways, except that when hawk signaled, i asked if we could go to the bathroom and they said sure. DH stayed with the bags in the special checking area, i went out of security into the main lobby area (pre-security), with my baby, our passports and boarding passes, and a diaper bag. it was a catch, so no need to change the diaper, but you never know if there's a near miss or what.
then, i met DH in security when we were done--having gone through security *again*. i was not unhappy to go through security twice to meet my DSs need, nor is this any complaint about the TSA. they were very efficient and friendly overall (much more so than TSA at Los Angeles where they are just, i don' tknow, rude? mean? something. it puts me off, they don't even smile at you when you say "good morning" and smile and give them your passport!).
so, he pooped then.
we get bumped, have a day in SF, and then get back to the plane on friday. again, going through SFO security, hawk signals, but this time we manage to get through DS and I) and DH gets flagged and so i continue forwrad and take hawk because he was signalling to go. DH met us at the gate.
once we were nearly to auckland, we pottied hawk before landing.
FWIW, we caught everything from 2 pm PST to 4:30 pm PST (the current writing of this) and used only one trainer for this whole long trip!

anyway, we pottied him before landing. we pottied him once he was off the plane. we pottied him before we went through passport control, and immediately after (that process took about 45 minutes, and in the AM--or whatever is his "am" and since he slept 12 hrs of the 13 hr flight, if igured it would be like an AM for him--he tends to go every hr (pee, of course).
then, we went to pick up our baggage before customs. i pottied him once we got our bags, and then we went to customs.
customs can have one or two parts. for most folks, it will have one whereby you get your passport checked and your declaration card checked off, and then your bags go to x-ray. because we were carrying a lot of "biosecurity" items, i knew that we woul dahve to do the second part of customs--biosecurity. which you do between declaration and x-ray.
when we spoke with the custom's officer, i told him that my baby may need to go to the toilet before we finished with biosecurity, based on the lines and the fact that we had 8 bags and the various biosecurity items sprinkled between them. luckily, they didn't ask us to unpack all of what we declared, only the items that concerned them most, but it was still a bit of a challenge! LOL
anyway, we finally get up to biosecurity table, and he signals for poop! i ask the officer there, and she points to a toilet for public use available in that area. i take him--leaving the bags with DH--and he just has gas, but potties a bit anyway (pee again).
we then get passed through to x-ray (a drum was taken to be fumigated--which we expected), and then we have to go to the office of biosecurity to pay for the fumigation. no biggie.
again, it's another 45 minutes to get to the second biosec office, and so i went to potty him again while DH paid the bill ($15 NZD btw--like $8 american). then, we went to get into the line for domestic transfers. . .to put our bags back on the plane.
that is a long line too, and there's a toilet there, so mid-way thrugh that line (too about 45 mins), i take him again.
finally, bags are on the way to the plane and we then walk (about 15 mins) between international and domestic terminals (i recommend this to anyone coming to NZ!) and we get to our gate. i get us tea and muffins, adn then DH takes DS ot the toilet. then takes him again before we board the plane. then again once we're off (hr long flight), and then again before we leave the air port with our bags.
so, all in all a good trip, even though we had this--what i consider to be funny--experience at the start. messy, but funny. LOL