It's definitely an anger and power issue. And no, it's not the first time I panicked...this happened a few times a few months ago. The first time, I was on the highway, and she was running up and down the aisles of the van throwing things. This was not too long after the baby came. Yeah, I flipped a little. (DVDs to be exact, we'd just been to the library and got a few.)
I never connected the dots, but its possible some of the behavior I saw around that time had to do with him and our time in the hospital----babe born out-of-hospital, home about 36 hours, admitted and babe and I spent 5 days there while he had many tests and surgery for his birth defect.....totally unexpected.
Yet totally inexcusable. Thanks for the info on those belt locks! I had no idea there was such a thing! There's a baby-stuff store here in town that sells *lots* of safety items, I might see if they carry these. If I can, I'd like to use them where the carseats are buckled in too so nobody can unbuckle those. (That's happened too, now I check when I'm loading the 2 year old.)