What You Would Do
Scream, pray, worry, or wince for the coming impact (which is almost inevitable).
What You Should Do
Look for a tree to grab, or a ledge that might interrupt your fall. If you think you might land in water, rather than on rock, angle your body to enter feet first. Otherwise, go limp and don't try to stop when you hit. This could cause more injuries. Always have another competent adult with you when you are in rocky surroundings, and ideally a way (such as a satellite phone) to immediately call for help. One or more of a climbing party should have professional first aid training.
What A Science Student Might Do
Calculate the velocity of the moment right before you hit the ground given that the distance of the cliff to the ground is x, the initial velocity is zero, and the acceleration of gravity is 9.8 m/sec2.
On the lighter side
Always carry a small bunny with you, so it can blow on your face.
There are many stories of people who have been saved by a hare's breath.
You might want to see if you have any wings with you (chicken wings, buffalo wings, any kind of wings) and attach them to your back. This will likely not help.
If you're Dean Potter simply pull the cord on your base jumping pack and land safely on the ground.
If you fall from high enough, your body will reach such a high velocity that impact with a surface (trees, rocks, water, ground) could easily cause major injuries such as broken bones, a fractured skull, a concussion, or ruptured internal organs. It is very possibly fatal.
A fall from a lesser height would normally cause less injury. Depending on the reason for the fall, one might "die of embarrassment" but not actually die.
SCREAMMMMMMMMMMMM AND HOLD A TREE BRANCHHHHHH QwQ
Falling
You falling off a cliff.
to plummet
No
The falling action is when Rainsford jumps off the cliff.
water falling off the edge of a cliff
Edward saved Bella from falling off a cliff in the "Twilight" series.
No u can not
did mary lambert die
By falling off a cliff and breaking her neck
I doubt anyone knows.
when he hugged his mom at the end after he saved her from falling off of the cliff.