Flipping coins early in a tournament.

It's generally a bad idea right? But what if there's some chance you have the best hand or you can make your opponent lay down. For example, say you are in the small blind with QJ suited and call. The big blind checks with ace 7 offsuit. The flop comes ace jack 8 giving you a flush draw and a pair of jacks. You bet pot, he reraises. Should you call or reraise all in? Again, this is very early in the tournament.