Scenario - instructing a lapsed PPL trying to get his licence back. Normal brief, taxi, checks, bit of a delay as the airfield was busy, then he flew the take-off. I had briefed that if there was an emergency, it'd be a real one (planned sortie was 15 minutes local GH then back into the circuit), I would allow him to handle it until I decided otherwise.
Spot on, he is a pilot not a student, albeit an out of practice pilot.
Not in immediate danger is a PAN call.