I SWEAR I can feel thing #2 moving.
I"m only 13 weeks, and i'm not "slender" by any stretch of the imagination, but I felt my oldest about this time. Its not gas, if it were gas, I'd be farting non stop... and it doesn't feel like the gas i've had all pregnancy- it feels like squiggly. The gas feels like its rolling. I have no other way to describe it. :P