I can't even conceive of tripping and rolling at the same time; I have no idea how anyone else could do it.
For one thing, my attention span and ability to focus on complex tasks (which can be awfully short when I'm stone-cold straight and sober) takes a vacation when I trip.
Assuming I didn't get completely sketched out of my skull and hide in the bathroom for a few hours until I came down, I can see myself getting onto the mat, squaring off with some dude...and looking at his gi and thinking "Damn, that is the bluest freakin' blue I've ever seen! It's...BLUE!! God, it's beautiful. How'd it get ot be so blue...what's with that weave? Damn, there must be...trillions...of little threads. Did he have that many patches a minute ago? Fuck me, they're multiplying!! Whoa, is he growing a beard? Awww, man...the paint's comin' off the walls..."
Twenty minutes later, people would be yelling at me to snap the fuck out of it, whereupon I'd just get subbed since that's all I'd have the motivation and mental faculties to do. In any case, it's stupid; if you're not sharp, you can fuck someone up in training. How anyone can get whacked and go to class, as many folks apparently do, strikes me as irresponsible and disrespectful towards your fellows. If I found out some fool broke my arm in three places because he thought it'd be cool to see what it's like to spar while tripping his nutsack off, I'd have his ass.