Well, these photographs (sorry, no scanner on this computer) show the Canadians disembarking, carrying bicycles, UNDER FIRE. It makes sense that bicycles were used for messages and communiques, but it seems odd that bicycle-carrying Canadians would be in the forefront of the invasion; it just makes more sense that they would have followed, not led, the guys with the guns.
"Ironically the greatest use of the BSA airborne bicycle in action was by British and Canadian infantry on the invasion Normandy, France (D-Day 1944 June 6) in the second wave. Some had been used on the invasion of Sicily in 1943 by Canadian infantry (Hastings and Prince Edward Regiment "Hasty Pees" re: Farley Mowat). "
Who knows... they tried a lot of nutty stuff during the war. We very nearly used bats to attack in WWII, but then we finished the nuke. http://home.nycap.rr.com/useless/batbombs/