We've all had a bad experience with marijuana at some point, but few have had a more disastrous sesh than actor Anthony Mackie, whose very first time smoking weed ended with him getting chased by an enraged moose named Betsy.

There's no way to summarize the insanity of the 'Avengers' star's worst trip, so watch the clip above to hear Mackie tell Jimmy Fallon about the one and only time he ever tried marijuana.