I want to buy this power wheels for my two children but...Need help...?

I want to buy this here: http://www.amazon.com/Fisher-Price-Ultimate-Terrain-Traction-Hurricane/dp/B000GZO7G2/ref=pd_sbs_t_2 for my children, now they are within the weight limit but I am not, but I like to test everything my children use before I let them use it to make sure it is safe, I am 212 pounds, If I was to use it and make sure it operates ok and all, what would happen or is this a bad idea? Would it crack, break or just not move? please help, I am just very concerned about my children's safety!