Whitewater canoeing is the sport of paddling a canoe on a moving body of water, typically a whitewater river. Whitewater canoeing can range from simple, carefree gently moving water, to demanding, dangerous whitewater. River rapids are graded like ski runs according to the difficulty, danger or severity of the rapid. Whitewater grades (or classes) range from I or 1 (the easiest) to VI or 6 (the most difficult/dangerous). Grade/Class I can be described as slightly moving water with ripples. Grade/Class VI can be described as severe or almost unrunnable whitewater, such as Niagara Falls.

The canoe (or just 'boat') used in casual whitewater canoeing is different from those used in whitewater racing. Traditionally, canoes were made of tree bark, sewn with tree roots and sealed with resin. Early whitewater boats were made of wood followed by aluminum and later fiberglass or kevlar, followed by more exotic composite materials including spectra, vectran and carbon fiber. The various composite materials are still preferred for racing due to the light weight, but most modern recreational whitewater boats are typically rotomoulded from a tough plastic or molded from a plastic laminate called Royalex which is an ABS plastic that is slightly flexible and very durable, if easily scratched but repairable using either plastic welding or a variety of patch bonding techniques. Boats can range in size from barely long enough to hold the paddler (around 6 ft (1.8 m) long), up to 12 ft (3.7 m) or longer for solo boats and typically 14-16ft for tandem boats.

Richard Vincent "Rick" Mercer (born October 17, 1969) is a Canadian comedian, television personality, political satirist, and blogger.

Mercer first came to national attention in 1990, when he premiered his one man show Show Me the Button, I'll Push It, or Charles Lynch Must Die at the Great Canadian Theatre Company in Ottawa. A pointed, satirical political commentary on Canadian life after Meech Lake, Show Me the Button made Mercer a national star as he toured the show across Canada.^{[citation needed]} Mercer came to greater attention for his role in the satirical news show This Hour Has 22 Minutes, and his spinoff special Talking To Americans was the highest-rated comedy special in the history of CBC Television, with 2.7 million viewers.

In 1992, he created and performed his second show, I've Killed Before, I'll Kill Again, which was also a popular touring show. Also in that year, he began to work with former CODCO members Cathy Jones, Mary Walsh, and with fellow Newfoundlander Greg Thomey, to create a new television series for CBC Television which became This Hour Has 22 Minutes.