WATCH: Commando's caught on video blasting a paparazzo with a profanity-ridden tirade

Commando just went off on a paparazzo.

Steve Willis, better known to The Biggest Loser fans as Commando Steve, was filmed hurling a string of obscenities at a photographer in Sydney. The trainer was fuming at the pap for trailing him last weekend while he was shopping with his daughter.

Memo to the paparazzi: Don't mess with Commando…or snap him while he's with his kids and girlfriend or you could end up co-starring in a video like the one above.

The Commando has become a favourite pap target ever since he started dating fellow Loser trainer Michelle Bridges. Judging from this video, he's clearly struggling with the attention.

TheFIX isn't sure what to think about this one. We're not saying the exchange was staged, but both guys appear all too aware they are being filmed.

Despite his profane outburst and crazy eyes, The Commando's body language seems strangely subdued. We were expecting at least a shove or a finger poked in the pap's chest.

He'd already called the cops on the snapper after last weekend's incident, but apparently having his "arse tackled to the ground by security" wasn't punishment enough.

"Steve is generally a really easy going guy," says his manager Lisa Sullivan. "He understands the role paparazzo play in the media and at times even shares a laugh with them.

"However sometimes they cross the line, which in this case resulted in words being exchanged."

View slideshow: Most notorious TV star meltdowns.