[Schwartzy61]

That's the play for him to make preflop. I don't think there is any etiquette or unwritten rule for play preflop.

When someone is all in and two others see the flop it is generally accepted in tournament play that you should check it down unless you have the nuts to maximize the chance at eliminating the short stack.

But since this occurred preflop I don't think there is anything wrong with how he played it.