In Zwolle you are preparing to turn left. You have checked the mirrors and are watching the oncoming traffic, but stop checking behind you because you are already in position. Right before you actually turn, a fast motorcyclist approaches from behind. What should you have done?
Nothing — after moving into position, traffic behind is no longer relevant
Check for traffic behind you again, right before you actually turn
Explanation
False — trap: rear check skipped. You watch for traffic behind you both before moving into position and again right before turning (Book p.138).