A Casual Tee.
Clickbait. Edit: Added a space which triggered someone.
A: A traffic jam!
Six. One to change it, one to take pictures and four to make t-shirts for the event.
A Casualty (Casual-Tee, as in Tee-Shirt) 100% Guraneed Originality You can know for sure I made it up because of how corny it is...