I can imagine this as a roleplaying scenario...
Player1: I look for traps.
DM: You don't find any traps, and you rolled pretty good.
Player2: I look for tracks...
DM: You find none.
Player 1 & 2 : This is way, way too easy....
DM: You're both correct! The air itself shatters like glass, and a monolithic dragon appears out of thin air! Roll for initiative!
player 1 and 2 peed their pants