Mine Field

Sometimes these micro buy in tournaments are a mine field for the first few levels.  Tonight, I was in the SB with KK.  The button raised big.  I reraised and he pushed in.  I instacalled and he showed the 69 offsuit.  The flop came 78T.  He flops the straight and I am one of the first eliminated.  What could I do?  Oh well, I will try again tomorrow night.