Ultimate Final Strategy (真・最後の秘策) is Mercenary Tao's ultimate technique.
When facing certain defeat, Tao begs for mercy by saying "Please forgive me!", making the opponent walk away. While the opponent is caught off-guard, Tao pulls out a grenade and throws it at the opponent, exploding in front of the opponent and inflicting a great amount of damage.
Mercenary Tao uses this attack in attempt to kill Goku. Tao jumps up into the air to avoid being caught in the explosion, but Goku kicks the grenade up to Tao, where he is seemingly killed in the blast. However, it is later revealed that Tao survives and is rebuilt as "Cyborg Tao".
In Dragon Ball: Mystical Adventure, General Tao uses something similar of the sort when he is overpowered by Goku, Arale Norimaki and the Gatchans. He begs for mercy, then brings out a capsule with a flying motorcycle and offers to go back with Goku to apologize to everyone. While Goku is distracted, Tao snatches the Four-Star Dragon Ball and flies off, launching missiles at his enemies. However, Goku kicks the missiles to the sky and Arale headbutts it back to Tao, presumably killing Tao.