Blind Man's Bluff. When Susie gets a gig singing at Slosh Mountain, "the world's coolest water park", she gives free tickets to Tommy and his friends. The kids are thrilled, not so much about the show, but about getting the chance to go on the mother of all rides, Whiplash Gorge. Unfortunately, Tommy and Dil soon learn they have to look after Grandpa Boris after cataract surgery on exactly the same day. Dil convinces Tommy to take Grandpa Boris with them to Slosh Mountain, but they lose him.