Zane Smith rammed Carson Hocevar's car after the race ended at Phoenix.
Sunday's Cup race at Phoenix Raceway. Tyler Reddick won, holding off Ryan Blaney.
Smith was fighting Hocevar for a top-10 spot when everything changed.
Ross Chastain hit Hocevar's No. 77 from behind. Hocevar pinballed into Smith.
Smith finished 15th. Hocevar finished 12th. The contact cost them both.
Smith hunted Hocevar down and drove his No. 38 Ford into the No. 77 Chevrolet.
Smith was going over 100 mph when he hit Hocevar's car, On3 reported.
His team said Chastain caused it. Smith replied: I don't give a [expletive].
NASCAR reporter Noah Lewis caught the moment. The clip spread fast on X.
Smith and Hocevar have clashed for months. Smith discussed it on a podcast this season.
Hocevar started 28th and charged to 12th. His car was pretty damaged, he said.
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