I hate to bring this up, cuz "Walla Walla, Mars" is a great gag, but the dude in the last panel creeps me out. It's the shark teeth, with the single front tooth centered under the nose, mixed with the male pattern baldness. He's registering 8.9 on the freakazoid scale.

(By comparison, platypuses register 7.4, but they don't typically exhibit such weird hair loss.)