When Peter Parker was a senior in high school, he was bitten by a radioactive spider which endowed him with the proportional strength and agility of a spider, as well as the mysterious "spider sense".

Spiderman's spider sense (also known as Spidey sense) acts like an early-warning device allowing him to instinctively react to unseen dangers.

Best Line to Use if The Amazing Spiderman was ever made into a Porno: