Northern Ireland rider Alastair Seeley was left seething after being taken out while leading Monday's British Superstock Race 1 at Oulton Park.
Seeley was carried onto the gravel by Alex Olsen as the pair diced for the lead on lap 11 of the 14-lap contest.
Olsen attempted a daring move up the inside of Seeley at Lodge corner before clipping the rear end of the Carrick man's bike, forcing both riders off the track.
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As Olsen attempted to restart his bike he was confronted by a furious Seeley. Olsen then lashed out at Seeley before the Co Antrim rider retaliated with a couple of blows to his rival's helmet.
Check out the incident below:
It was a stormy end to both men's race, and denied 43-year-old Seeley of a potential win at Oulton Park.
Olsen told Eurosport: "I didn't really know much about it (the collision). We were strong into that turn and everyone seemed to be a bit slower than me.
"He kept guarding the right hand side so I knew I had to make a bit of a lunge on him. I thought I was on the inside and he just clipped me.
"I don't know if he saw me, but I tried to keep us both upright as much as I could. I wasn't expecting a full fight in the gravel.
"I am sure we are going to get our wrists slapped."
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