C4 Fairy

Someone who throws bricks of C4 onto unsuspecting soon-to-be victims from high altitude.
The required high altitude is often achieved by flying (using e.g. a jetpack).
Successful detonation leaves the victims in confusion and salty.
Commonly resides in the game Planetside 2.

Higby: "Bullsh*t! Where the f*ck came that C4 from?!"
Clegg: "Must have been a C4 Fairy."