That stiff arm appears to have hit the neck or facemask of the defender; either should have been ruled a foul and the play nullified.A five or 15 yard penalty would go with it depending upon where the ref spotted the hit.
Faith …Hope…Love …these three abide; but the greatest of them is love.This is my commandment, that you love one another, that your joy may be full.Love your neighbor as you would love yourself.Do unto others as you would have it done onto you.
find five other reasons to be down there before taking the plunge. and be sure of your handholds for getting up again.