He actually has anger issues like
Bro: HES FAT HES FAT HES FAT!
Mean Bro: ..You have low IQ.
2 hours later
Bro: MUM MUM MUUUUUM!
Mum: WHAT?
Bro: MEAN BRO HIT ME (lie)
Next day
Mean bro: *Helping him with legos and accidently drops a lego peice*
Bro: YOU IDIOT! *rips Instructions*