A dozen people standing in a rectangular formation +
Brown inner tubes +
Some big sheets of cardboard for the people on the outside
= a box of donuts

HALO Spartans
Clone troopers

The dhmis crew

The twelve trolls from Homestuck

The Doctors (or so suggested my friend. I'm not exactly a fan of it). The characters from Don't Starve.

The Black Parade

my face

Reservoir dogs