$500 NL, Busted with 10 10. How did I play this?

[spex x]

I don't understand this at all. How is it a spew? I led out for $50, the original raiser and everyone else folded except a player with 99 who I was obviously going to call. Then the BB thinks forever, not acting. Then I put a good read on him, knowing that he didn't really like calling the $75, and I put him all in for $300 more. He had to think for like 5 minutes before calling. Put yourself in his place - would you have been able to call here with JJ? I wouldn't have given the action. I knew once he called the $75 that he had 10 10 beat, but I thought he would have to fold for so much more.

So, in sum, I got the player with 99 all in against 10 10, and I very very nearly got the player with JJ to fold. How is that a spew?