Is it a horse? Or is it a torus?

This costume won second place. Catch the special appearence of drew, dressed as Micheal Kielstra, and Micheal Keelstra, dressed as Micheal Kielstra. (I was in the front of the horuse and not able to see, so I had no idea we got photobombed until seeing the picture a couple days later)

The horuse skeleton was an innovative construction, a torus woven out of plastic tubing, held together by friction.

The horuse skeleton was an integrable part in my trick-o-treating costume this year, where the torus was the shell for my snail.

Some much needed explanation. I, the golfer (right) managed to get the golf ball into the hole (left) in two strokes. The hole, of course, is on the butt. Therefore, I got butt in two. Butt in two. Bott in two. Bott and Tu. Like,,, the textbook.

Somehow, this won.

Specifically, “category theory for a working mathematician” by sandy mclane. Scariest thing I could think of, the definition of associativity for a 4-category.

I helped olivine make this costume, concept and excuction! Its a sea-star, with an algae-bra. Like, a $\mathbb{C}^\ast$ algebra. This won the department contest, I think due to the sex appeal.