You'll Die a Painful Death! (苦しんで死ぬことになるぞ) is a rush attack used by Super Buu after his absorption of Gohan. First, Super Buu w/ Gohan punches the opponent in the stomach and jumps into the air to elbow them on their back. Then, he kicks the opponent up into the air and teleports behind them to backhand punch them away. Finally, Super Buu puts his hands forward and fires many pink energy blasts at the opponent, inflicting a high amount of damage.
Super Buu w/ Gohan uses this attack during his battle against Vegito in his Super Saiyan form. After getting kicked in the nose by Vegito, Super Buu wipes away his blood (which is strangely purple) and attacks Vegito with the "You'll Die a Painful Death!" rush, knocking and blasting him in the ocean. However, Vegito easily withstands the attack and continues the battle with Super Buu.