Riddle: What stays where it is when it goes off?
The phrase ‘go off’ means both misfire a gun and literally leaving where you are at that moment. In this riddle, this word is used in the first sense of it, however, the person who asks the question wants to make you think it is used in the second sense of it.
He manages his goal of this by telling us that the answer of the riddle ‘stays’ while it goes off, and this makes us think the phrase go off is used in its second sense. So, we get confused and try to figure it out. The answer of this riddle is a gun.
The answer is: A Gun.