The Happy Scaffs are a group of scaffold workers who “love to sing along whilst in there [sic] work vehicles and have fun whilst at work,” according to their Facebook page.

Apparently, they also enjoy making videos showing them using construction equipment in creative ways. A video from March 9 shows several of them popping out from inside large yellow construction barrels, as one of them tries to smack their heads with a large pole, essentially creating a life-size version of Whac-A-Mole. Credit: Facebook/The Happy Scaffs via Storyful