I'm going to laugh at my friend who got in a car accident
Why would you laugh at someone after they've had a car accident?
I want to laugh because he deserves it.
It's pretty rude to laugh at someone else's misfortune, especially something like a car accident. You will probably hurt the friendship if you do that. At the minimum, you should make sure he's not hurt first.
I'm going to laugh because he took off of me so I should call him out on it.
Even if you had a bad experience with them it is wrong to laugh at the accident that they had.