Rihanna was infamously unamused at certain moments of last night's VMAs (Miley Cyrus and Drake's performances, to be precise), but that doesn't mean the always fun singer didn't find other ways to entertain herself. To wit: Rih knocked some popcorn onto her friend's lap, only to keep chair-dancing and find a hilarious place to put it -- underneath the girl sitting in front of her.
The best part is obviously the devilish grin she flashed her friend after she committed the crime. Take a look below. (Bonus: a wider shot on YouTube reveals One Direction's Harry Styles furiously peeling an orange behind Rihanna, our merry prankster. What a party!)