The endo, short for end-over or end-over-end, is a type of pitch
over crash where the cyclist goes over the handlebars, the
weight offset of which causes an inertial moment to act about
the front wheel resulting in rear portion of the bicycle to flip
in the air above and behind him. Usually, the cyclist, as a
sudden reflex action, yanks out their hands or legs at some
point to cushion the impending fall and ends up letting go of
handlebar control. Meanwhile, the bicycle is bound to fall
either sideways, due to its motion about the steering axis or
right on top of the cyclist. In the latter scenario, the saddle
or even the rear wheel itself could land on the cyclist's body.
Again, an endo is a crash that could cause injury. It is not a
bicycle trick. That one has another name. Its called a 'stoppie'
or a 'wheelie'. An endo is caused due to strong front wheel
braking or when the bicycle hits a curb, a structure more rigid
than the wheel itself. Endos may also occur if the front wheel
is loose, i.e, if it is not