Self Destruction

I let my guard down and now I have no chance of winning. I must self-destruct. I'm sorry, professor...

Self Destruction (自爆, Jibaku) is the ability to detonate oneself. It costs the user's life after performing.

Overview
The user can cause themselves to explode with varying effects. It is a last ditch effort and used only when the user is incapable of defeating their opponents in combat.

When Genos loses his battle against Mosquito Girl and is about to be killed, he attempts to self-destruct and eliminate the monster with the blast. Before the cyborg could actually perform the technique, Saitama slapped Mosquito Girl to death, saving Genos and leading him to stop his action in time.

During his battle against Eyesight, Child Emperor orders an Underdog Man to grab the monster and self-destruct. The robot is then destroyed, but Eyesight managed to withstand the explosion.