Jacksterback - A random memory that hits you like a punch while you're gett

A random memory that hits you like a punch while you're getting off. It might be from years ago or just a few minutes ago.

I was jacking off and suddenly I was back in high school getting yelled at by my principal.

I had a flash of the time I got caught jacking off in the library.

I was getting off and I remembered when I got caught by my dad.