"It's not an easy injury to come back from, but I do s*** that's not easy all the time."
That's former UFC light heavyweight champion Jamahal Hill talking about the devastating injury he recently suffered during a pickup basketball game ... admitting he doesn't know how long the torn Achilles will keep him out of the Octagon while vowing to make a return.
TMZ Sports caught up with 32-year-old Hill at LAX earlier in the week -- who was using a scooter to get around -- as he arrived in Los Angeles before surgery .