Let's pretend you have "Hane-Hane" Set face-down on your side of the field. Your opponent has "Dark Magician" (ATK 2500) and "Celtic Guardian" (ATK 1400).
If your opponent attacks with "Celtic Guardian", then your "Hane-Hane" flips face-up and activates its Flip Effect, which lets you return 1 monster on the field to the owner's hand. You pick the "Dark Magician". Your "Hane-Hane" is destroyed, but you take no damage this turn because "Dark Magician" didn't have a chance to attack.
If your opponent had attacked with "Dark Magician" first, you would have to choose between returning "Dark Magician", in which case "Celtic Guardian" could still attack and do damage, or returning "Celtic Guardian", which would leave your opponent's stronger monster on the field.
This is why it is usually a good idea to attack with your strongest monsters first. |