Just busted out of $1 tourney

I just busted out of a $1 tourney at Full Tilt. I was in SB with 8s4s. The pot had 5 limpers, I limped, BB checked. I flopped bottom 2 pair. There were 5 players, so I bet the pot. Everyone folded to the button, who moved all in. I called. He held a straight draw and a flush draw. He hit his flush on the turn and I couldn't fill up on the river. Unlucky.