I'm thinking of buttering my friend's popcorn with car grease.
Are you kidding? Why would you put car grease in his popcorn?
Because I saw him try to do the same to me.
If you friends actually eats the car grease he could get sick. It's really not okay to intentional make your friend sick. Think of a safer prank to play on your friend.
No, I'm going to put the grease on his food.
But what if he gets sick and has to go to the hospital? You should play a less harmful prank on him instead.