it was the nuts on the flop, even if they call with a draw and hit you can redraw to a full or quads, i would overbet making their call incorrect as pot odds vs %of hitting their draw is not enough, im not going into implied odds as that is a subject that everyone thinks that im wrong.
i see what you mean as it is early in a tourney but any pot when or where in a tourney when i have the best of it at the time im betting, raising, shoving as i believe that you need every chip in play to win the tourney( i cant talk from experience but it does make sense what i have learnt)
just unlucky, next time you will have a stack to bully weaker players.