Term: danger wank
Example: "guy 1: "dude, i tried a danger wank last night, it went horribly wrong"  guy 2: "ddddduuuuuuuuuuuuuuudddddddddeeeeeeeeeeeeeee"  guy 1: "no, it's ok, she helped finish me off""
Definition: while your jerking off, as your about to cum, shout down for your mother