He wanted to show off his athleticism and paid the price. The secret to beating Bigfoot has always been speed since it's hard to compete against him in size and bulk. He hurt his knee after the first kick. After that, he had no chance at winning that fight. Still, if he hadn't done it, who knows? I don't think Bigfoot would've been able to keep up with him.
I liked Travis Browne but I expected him to lose to Bigfoot and he did.
What I didn't expect was him to come out with Cruz's mini shorts and dance around like him. Tearing your hamstring is what you get for doing that.