I confessed this once to a priest after I pulled an “all-nighter” to write a paper and then drive the 30 miles on the highway to school. When we stopped moving because of traffic, I fell asleep and coasted into the car in front of me. It only caused minimal damage to either car, but it was STUPID. So I confessed it and said I could have really hurt someone, and he said it was still only a venial sin, didn’t say why but I assumed it was because I didn’t *intend *any evil to come of it? I dunno if that’s a reliable answer or not.
Still though, don’t do it! Ack…it’s the worst sound in the world to “wake up to”…your car coasting into another, that is.