Hide in a dark room and lure the victim in, then set off the trap to scare them to death via heart attack.
Turn the ring-tone on it to Rebecca Black's Friday, leave it in their high-rise apartment, and call it repeatedly until all residents in their apartment dive off the balcony.
A strip of crispy bacon and a side of sunny-side up eggs.
Put poison into the food. Make the victim eat it.
Throw the victim from the top of the tree.
Shove if down their throat, taking care to stab through the walls of their throat so then they bleed to death.
Tickle the person until he falls off of something high.
Give the midget a gun and a Monster Energy
Depends on how fast you want your victim to die.