A tornado but sometimes there are none. So i guess lightning.
Lightning is called the THUNDERSTORM'S WORST KILLER
nicole
Tornadoes are called a thunderstorm's worst killer.
Tornadoes are called a thunderstorm's worst killer.
Hitler
attack of the killer tomatoes
A killer whale will travel for miles, for a decent meal, but if food is scarce, it will just feed on fish, and dead animals. If worst comes to worst, it will even leap on to the shore, to catch seals, and sea lions.
Humans. Humans are unfortunately the worst predator on Earth. Well, at least it means that we're not likely to be all killed by killer whales.
Michael Myers. If by best, you mean worst, see the links below.
2000 is when the first killer flood happened
The cast of Your Worst Nightmare - 2010 includes: Benjamin Fuller Maria Lively Stephon Stewart as Killer
F2000 Silencer FMJ = UMP killer WA2000 is the worst gun in all of the Call of Duties after MW1