Sunset convinces Twi to come back to try some thing that Equestria doesn't have. Sunset Shimmer, Tree Hugger, & Fluttershy like it want Twilight to like it too. And they go to TacoBell. (It is legal for them to be smoking pot in this story).
Content warning: marijuana. If you would not like to read about ponies getting high, Don't just read this story to hate on it