Although he should be preparing for his upcoming WWE Championship match later tonight, Brock Lesnar has been filmed causing havoc with the cast of Jackass.

Lesnar, 44, will be defending his WWE Championship on Saturday night in a match against former champ Bobby Lashley at WWE's Royal Rumble event. However, just one night before the big title match, the former UFC heavyweight champion has been recorded slamming Jackass star Wee Man through a restaurant table.

In a video obtained by TMZ Sports, Lesnar can be seen at a restaurant in St. Louis, Missouri, surrounded by the cast of the upcoming Jackass Forever movie.

Check out the moment below:

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The 6-foot-3-inch beast can be seen hoisting the four-foot Wee Man into the air, before slamming onto a table. The table then appears to collapse as a result of the slam, as fellow Jackass star Johnny Knoxville watches on in the background.

TMZ notes that 48-year-old Wee Man - real name Jason Shannon Acuña - was fine after taking the bump, although, he was probably a bit sore this morning.

Lesnar's upcoming WWE Championship defense takes place later tonight at The Dome at America's Center at the Royal Rumble event.

Also competing at the event is fellow Jackass star Johnny Knoxville, who - at the age of 50 - will be entering the 30-man Royal Rumble match, with the winner going on to face the champion of his choosing at the WrestleMania PPV in April.

So, in theory, we could be seeing Lesnar vs Knoxville in the ring in just a few month's time. Weirder things have happened in the WWE.

Knoxville has been hyping up his appearance in the match in a series of segments with WWE Superstar Sami Zayn on Friday Night Smackdown over the last few weeks.

Additionally, Knoxville recently revealed that he suffered a brain hemorrhage while recording the latest Jackass movie.

[[imagecaption|| Knoxville in Jackass Forever. Credit: Entertainment Pictures / Alamy]]

In a recent interview with Howard Stern on The Howard Stern Show, Knoxville spoke about a particular stunt involving a bull.

"I got a brain hemorrhage from that. So my cognitive abilities were in steep decline after that hit," he revealed.

The star went on to say that his family don't want him to keep risking his neck, saying: "No one in my family is happy with the stunts and the bull hit was the worst hit I've ever taken from a bull or, maybe, period. Like I said my cognitive abilities really declined."

To illustrate just how bad the brain damage was, Knoxville recounted a visit he paid to the doctors.

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"I remember taking some tests, the neurosurgeon said 'do you have trouble paying attention right now?' I said 'yeah, why?' He goes: 'Because you scored a 17 on my attention... that's out of 100,'" he said.

"I laugh now, at the time I was like 'oh no'. Because, you know, I had to go under all these types of treatments, this transcranial magnetic stimulation which they buzz your head with these magnets for about 30 minutes at a time for like, I would say, 10 to 12 treatments over a series of two months," he continued.

Featured image credit:

Brock Lesnar slams Jackass star Wee Man through restaurant table