I've never been drunk either, though I /have/ been brave enough to drink
a little more than I used to as of late. (Translation: I'm now able to finish a
single drink.)

I think that a big part of my phobia revolves around the amount of vomit.
If it's a little, I still freak, but - LITTLE GRAPHIC - I've had sour burps in
recent years in which a little... stuff comes briefly up and I've handled it
well enough. But the more there is, the more nightmarish it becomes in
my mind. I think another large factor is the lack of control. If it's multiple
and /lots/ and I can't do anything to stop the horror, well... Yeah. It's
terrifying. That's why I was traumatized by movies such as Problem Child
2, Sandlot and - though I haven't actually seen the scene, only heard it -
Stand By Me. Large amounts and there's a feeling of helplessness with
each one (i.e. innocent victims).