About an hour into a tournament recently and doing OK. Blinds 100/50 chip stack about 8500 (started 7000).
One player raised 3 times big blind and I, with KK, reraised 1500. Other player rereraised 4500 and after guessing no AA
I went allin.
Other player had JJ and caught third on turn (and fourth on river, by the way). Me out of tournament.

I didnt think other player's play was good. However, maybe I could have  played differently as:

a) I was enjoying tournament and maybe allin at that stage was not best move

b) Maybe I should just have let other player take pot after 4500 raise(might have had AA anyway)

That way at least I'm still in.

Does anyone  have any thoughts?