I did one in Newcastle in 2006, i only had to pay £50 and im sure it only lasted about an hour and a half.
In mine it was all about stopping distances but also just watched a load of videos about crashes. they asked who speeds in a 30, 40 etc and we had to put our hands up. at the end he said 'so now lets see who will speed in a 30' and still people put their hands up!

bloody waste of time. if people are going to speed they are going to speed a few videos from the 1980s wont change peoples minds.