I disagree. It wasn't dirty at all.
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So here's Thibodeaux and he clearly sees 81 coming right at him face to face. This is perfectly 100% legal.
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But then Thibodeaux, knowing 81 has a head of steam and he doesn't, basically turtles up to try and avoid getting blasted.
81 absolutely cannot slow up or stop just because Thibodeaux is scared to get hit. He is instructed to legally cut block from the front and Thibodeaux turned himself into a sideways hit because he was scared and ultimately got himself hurt.