A guy that looked like STEVEN SPIELBERG showed up at an event called the Cannabis Cup in Colorado on Sunday 4/20. . . which was  the unofficial stoner holiday.  

He told people he WAS Spielberg in order to get hooked up with freebies . . .

It WORKED. And there's video of the guy lighting up.

Spielberg's rep says this was NOT him. And you can kind of tell from the clip that it's not. Unless you've been hittin' the bong.