Just found a brilliant activity for teaching moments at A-level. You can find it at http://www.revisingphysics.com/. You then click on “A-level”, then “The Italian Job”. You need to watch the end sequence of the original version of the film. Luckily there is a Youtube clip to this on the revisingphysics.com site (under “Physics on Film” in the A-level section). The worksheet then poses two questions; a moments question to work out the position of the centre of gravity of the people and then a “discuss” style question to figure out a solution to the problem.
This is a brilliant activity for A-level students as it takes an otherwise dry topic and really makes it fun. Couple this the experiment to find the centre of gravity of a person laying on a plank (think it’s an old Nuffield experiment) and you have a really good (may I say outstanding!?) A-level lesson!