In DnD 4e there's an Encounter Power called Phrenic Strike.
The flavour text reads:
You fight past your enemy's attack to deliver a punishing blow to its body and mind.
The Effect says:
Before the attack, you shift 1 square.
Which is followed by an attack.
BUT, the Trigger says:
An enemy hits you with a melee attack
I see there to be some contradiction: The enemy needs to hit me in order to trigger the power, but the Effect says that I shift before the attack? So will he still do damage or won't he?