This is the stuff nightmares are made of!
A passenger on a recent Air Canada Express flight taking off from Montreal filmed a wheel from the landing gear setting off sparks as the plane rolls down the runway. Then, you see it FALL OFF after the plane goes airborne! What goes through one's mind while watching this happen?
Luckily, the wheels come in pairs so there's still a remaining wheel to land on, which they safely did. Luckily, no one was injured!