wolf, it doesnt matter how fast you're going, the airbag sensors only record how abruptly you stop. if you go from 15mph to 0 too quickly they'll deploy ... it's the rate of deceleration. has anything been said about why he hit the tree? was he just so blitzed he swung that thing to a tree or nailed a pothole or what? being sober and getting smashed by an airbag will make almost anybody fail a field sobriety test (trust me, sob's hurt and the sulfer smell's enuff to get ya stoned instantly). if he's telling the truth about 4 drinks he should be ok ... especially since it was at dinner it'd be tough to down em in less than an hour. if he was toasted and got belted by the airbags i dont think he'd have had the conscienceness to change a tire. it happens, life goes one ... hope it all works itsself out.