I think a long race with the idea you might need a pitstop or not, is a great idea. You will have so many different strategy's, like will he save the tyres and not go for a pitstop or will he go all out and have a pitstop
I like energy drinks, but i can only have one or i shall be going mental for the rest of the day as i found out. 35p for an energy drink. Defiantly worth the bargain