We prank Grandpa during the mannequin challenge by making him suffer through it repeatedly. For copyright reasons, we couldn't use "Black Beatles" like most Mannequin Challenge videos use for our beat, so instead, used a reproduced version by Alex Smith! BEATS BY ALEX SMITH – https://www.youtube.com/channel/UCVykaLHgXttjZthPcH7cIwQ ANGRY GRANDPA SHIRTS / HOODIES!!