Who's Mad, or Who's Behind You! on the PlayStation version, is the third job in Grand Theft Auto 2 given to protagonist Claude Speed by Elmo of the Loonies. The mission is available from the left of the two yellow Loony phones in Fruitbat of the Downtown District.
Elmo informs Claude that a friend of his has a job for him. Claude drives to the meet but instead is ambushed by Elmo's brother's Zaibatsu hitmen. In defense, Speed kills them all.
Completing the mission will give you $40,000.