1.   By the time the raft flipped, Venneberg said, water in the round boat was at midcalf.

2.   The problem is that your raft never flips in calm, flat water which is, of course, where the drill takes place.

3.   On Tuesday, a South African tourist died from a heart attack after he plunged into the Zambezi river when his raft flipped near Victoria Falls.

4.   The first raft flipped over on a high wave, causing all seven on board to fall into the icy water.