Ahead of his biggest test to date, this weekend’s ‘UFC Fight Night London’ headliner, Jimi Manuwa, touched on his punching prowess in an interview with ESPN.

The light-heavyweight fighter has finished 100% of his opponents with strikes and looks to make Alexander Gustafsson his latest victim.

Gustafsson is one-fight away from a rematch with Jon Jones, but Manuwa plans on spoiling that party.

From ESPN.com:

“We used to go to the fairground [funfair], and there’s that punchable thing that measures your power,” Manuwa told ESPN.com. “It was from one of those that I knew I could punch. My friends would come around, and we’d have competitions.

“I broke my hand on them. A couple times.”

The thing Manuwa has going for him, though — and everyone seems willing to agree on this — is that he possesses devastating, can’t-be-taught, either-you-have-it-or-you-don’t knockout power.

It’s “God-given,” as Manuwa puts it. When asked if a specific moment stands out when he really knew he had shook someone, Manuwa replied, “I have 14 stoppages. There are a lot of those moments.”