An old guy runs on a treadmill. The Grim Reaper runs on the treadmill behind him. Most gyms make you leave your scythe in the locker room. This Crunch Fitness spot by Big & Tall Advertising and O Positive serves as a potent reminder that exercise can kill you. And even if it doesn't, something else will. Death always catches up in the end. Unless, of course, his membership expires.