Father Time waits for no one, including the Dead Man.

The Undertaker returned to action Sunday night at WWE SummerSlam, where he squared off with Brock Lesnar in a rematch from WrestleMania 30. It was brutal affair with a shady finish, as Undertaker scored the win in controversial fashion — at least, as controversial as you can get when the match is scripted, but you get the point.

As ‘Taker was heading to the backstage area after the match, however, he looked a little off. The 50-year-old struggled to make it to the back and put his hand on the screen to steady himself. Then, before making it through the curtain, Undertaker fell to his knees.

[tweet https://twitter.com/Cultof619/status/635671553557012480 align=’center’]

Obviously, with anything WWE-related, you have to take this with a grain of salt. This could be a work and just the Undertaker selling the effects of what appeared to be a real physical match. However, it should be noted Undertaker has had health problems in the recent past, as he reportedly suffered a concussion early in that WrestleMania 30 match with Lesnar. He’s also 50 years old, which could explain some things, too.

Thumbnail photo via Twitter/@IGN