Recently, CM Punk spoke to UFC Unfiltered and spoke about the basic difference between the WWE and UFC, "In [professional] wrestling, you're trying to make it look like you're smashing a guy without actually touching him at all. And somebody who was super, super good at that was Bret Hart. He always made it look like he was killing a motherf--ker and he never was. And there [are] guys that are really, really good at that and there [are] guys that aren't so good at that. Some guys are safer than others and that's all I'm saying. I worked my share of unsafe guys and that's not to say they have the mentality that there were going to go in [the ring] and hurt me. Some guys are just clumsy. f--k, I was a clumsy motherf--ker. I was never the most super athletic guy, so sometimes I'd do s--t and f--king end up hurting myself."

Punk also said that he used to be doubly cautious when he fought against wrestlers he didn't particularly like, "The people you actually wind up beating the s--t out of, those are your friends. If I was wrestling a guy I didn't like, I would make sure to go out of my way to not f--king stiff the guy because then there's a problem because he's like, 'oh, you did that on purpose'. If I f--king clock my friend in the face or kick him in the nuts or step on his hand or something like that, it's just funny. You can laugh about it afterwards."

On the difference between WWE and UFC, he said, "I think the good ones, the interviews and the promos people remember, those are improv. Now, [professional] wrestling's just overscripted to death. It's almost like they have a chokehold on it. Some guys need to operate that way and I feel like some people need to let loose and be themselves. You've got a whole room of guys writing for you. They don't know you. They don't know where you're coming from. They don't know your perspective or your character and stuff like that. And if you're out there being disingenuous and saying words that three other people wrote, I always felt that the crowd could tell and then they're going to pay attention to their phones or s--t on whatever segment you're in. So yeah, I was always a fan of just kind of doing my own thing."