Wellington prop Tolu Fahamokioa has had the ultimate brain explosion during his side's 43-31 defeat to Waikato in their Mitre 10 Cup on Wednesday night.
The 27-year-old was sin-binned early in the second half for punching Waikato opponent Jordan Manihera in the groin.
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Fahamokioa was lying on the ground, when Manihera came through, attempting to clear out a ruck, and clipped the prop in the head with his knee - prompting a punch to his crown jewels.
Manihera retaliated with a punch of his own, which caused a small scuffle between both sides.
The referee sent both players to the sin-bin for throwing punches.
Things didn't get any better for Wellington, who went onto lose the match by 12 points - their second defeat of the season.
Mooloos winger Sevu Reece scored three tries for the hosts, as they snapped a 10-game losing streak dating back to last season.
Raniera Takarangi, Samisoni Taukei'aho and Manihera also scored tries for Waikato, while Trent Renata, Isaia Walker-Leaware, Matt Proctor, Losi Filipo, Malo Tuitama all scored for Wellington.
Both teams will play their next fixtures on Sunday, with Wellington hosting North Harbour and Waikato facing Taranaki in a Ranfurly Shield clash.
Newshub.