Several times in the past, when I have asked a PPL on a check ride to go around from landing config without previous briefing, he has pitched up before adding power. This is a fact, also if an a/c on the runway is a bit slow on taking off, the tendancy for a pilot on finals is to slightly level off while looking at the a/c on the ground, setting up for a power on stall. After a sneaky assesment of a pilot on a checkride, I would at a safe hieght talk him/her into a power on climbing stall with 20flap on a C150, and I have always been thanked for the excercise. Pilot who say "Iwould never get in that situation" frighten me.