Running

There's a memorable scene in Dean Karnazes' Ultramarathon Man (2006) where, after a first night of running through an entire weekend (for a total of 299 miles iirc), he calls in an order for a large pizza pie, an entire chocolate cake and some coffee. The delivery person brings it to him on the highway he's running, driving alongside him so he can eat and run. When I read it I couldn't imagine having that much fat swirling around in my stomach while running, but since then I've done a few ultra distances and honestly, I get the appeal.