Non-Cowardly Stick Man Running From Yellow Stripe
This looks like a white-bordered, yellow, cracked arrow, which it is, in Flatland. However, in the world of three dimensions, it is a speed bump. Somehow, Flatland space became warped, and the yellow rectangle cracked at the strain.
I got another one: Why did the chicken go to the seance? . . . To get to the other side!