It has been suggested that the parents - being on a seperate boat - are maybe getting a whole different experience out of the trip thus far. My dad sounded pretty disappointed that he hadn't even been invited to the mud fights... We youngsters tend to be a bit crazy on the river; overtaking in narrow tunnels, not applying sunscreen, driving through bushes, and ducking at just the last second before going under a bridge... Yup, we're pretty crazy like that.