For me, it would be killing myself with a rocket.
[spoiler]• _____
/ _____\ __ ____ __
\/ •—• | \ / / \ | /
\____/ \/\/ \__/ | •
___/ |___
/ \_/ \
| / \ |
\ \ \ \
\ \______\ \[/spoiler]
-
Fist of havoc-leaping off the Shores of Time at Zone B area, more than once.