Ring the Changes
'You run your longsword through him and he drops to the ground, dead.'
'Good. That means I can move and not provoke an opportunity attack.'
'Not from the dead kobold, you're right.'
'I meant the other one, the one that's still alive.'
'But you also don't provoke from the dead one.'
'Which I believe is a change from third edition.'
'...but not 3.5.'