This TTC offender might just be worse than the people who refuse to take their backpacks off during rush-hour.

One man decided to use the subway as his own personal jungle gym as he hung upside down by his legs from a bar attached to the roof of the train.

Caught on video by Twitter user TTCEEN, the man seems to be attempting a hanging sit-up in front of an audience of fellow commuters.

Just one more day in the #TTC 📸 by @phquedinho
.
.#ttceen #toronto #transit #gtatoronto #torontogta #subwaycreatures #subwayriders #the6 #6ix #commuterlife pic.twitter.com/gjdc0C9uwt

— TTCEEN (@ttceen) May 13, 2019

This TTC gymnast hangs suspended from the bar for nearly 20 seconds before not-so-gracefully dismounting from his metal perch and landing safely back on the ground.

This isn't the first person spotted using public transit for a quick parkour session.

Last month, the same Twitter account caught a man swinging from the subway bars trying to do a backflip before abruptly falling and landing on his head.

Natural selection #darwinism 🎥 by @nelsondavidcc #ttceen #toronto #transit #gtatoronto #torontogta #th6 #6ix #subwayriders #subwaycreatures #funny #ontario #canada pic.twitter.com/QszuKO57B6

— TTCEEN (@ttceen) April 9, 2019

If you're lucky enough, you might be able to catch a cool dude doing some pull-ups before hopping off the subway. Got to get those reps in!

Why go to the gym when you got the TTC subway pull up bar pic.twitter.com/hxwHpCKbzu

— B (@Barrington_S) July 20, 2017

Maybe these guys should head to the gym to get rid of some of this extra energy before taking to the TTC to show off their sweet moves—or lack thereof.