The jackpot is triggered by a specific combination of symbols on the reels. When you pull the lever or push the button, the random number generator generates a mixture of symbols. If the given combination matches the jackpot combination, you win big time.

It will not hit again for a long time.\n\n FALSE. Each reel spin has the same odds of winning  or losing  as any other reel spin. The fact a jackpot just occurred has no impact on the outcome of the next play.