Well #3 is the least stupid because he won't fall off.
#2 is cynical because he's going to make #1 fall off
#1 is complacent because he's letting #2 make him fall off.
#4 is probably the most stupid, but he could just be depressed.
I say #2 because he's not paying attention to #3 and he is going to reap what he's sewing.
i think all of them must be stupid 😀