A rider on horse back falls when horse starts running all of a sudden because

A man getting down a running bus, falls forward because -

Why does the horse rider falls falls forward when a horse at full gallop stops suddenly ?

Why does the horse rider falls forward when a horse at full gallop stops suddenly?

The rider tends to fall backward when a horse start suddenly. This is due to ___________ of ______________.

Fill in the blank with suitable article given in bracket. ......... black and white horse was running on the road. (a/an/the)

Elephants in the Bandipur forest started running helter and skelter due to smoke because of?