I suspect jury tampering.
I can maybe see the rock shooting sideways, though even then it would have to overcome the rotation of the wheel. Any forward force from impacting the tyre would be along the ground, at best. Where would it get the energy to shoot several feet in the air?
Velo Vol does not buy the magic pebble theory.
Originally Posted by
stien
Imagine hitting a spherical solid with a solid wheel...it'll shoot out front. If the tires were at a decent psi and a roundish rock was on a semi slick surface - I say feasible.