Hey some death can be funny! Depending on how they die. This not really :/
Anyways, back on topic, he shouldn't have been driving if he was that drunk/sleepy. People need to use common sense before they go out driving. And the VERY first thing you do before you even start the car is USE THE DAMN SEATBELT! Sure it can cause some problems if you're flying forward, but not in this case. I think he wouldn't be so banged up if he survived.
Even if he didn't die, people are laughing at the fact that he was probably seriously injured and that he could of died. If this were to happen to you I don't think you would find it to be a laughing matter.