Mugging, if you will?
Hamming it up?
Yeah, well, some of us never really grow out of that...
"Doh-de-doh-de-doh... I love playin' with my hoodie! CHEESE!"
"Yee-haw! I'm a-ridin' a buckin' broncho! Giddy-up, little doggie!"
"Look, Ma! No hands! (Haw haw haw.)"