Is it just me, or did the original Sharptooth have some insane athletic abilities?
The Sharptooth has physical abilities that rival Marvel comics superheroes.
He was thrown into solid rock so hard that it cracked (this occured more than once). He fell over 750 ft and landed on his back and was only stunned. He sustained several powerful blows to the head and body and seemed to only barely flinch (I'd guess that each blow from a full grown Apatosaur tail is like getting hit by wrecking ball).
A fan fiction I saw had him thrown into the Sinking Sands and totally sunk in it (even his head), only to have him literally jump out of the sand moments later.
His jumping is also near (or at) supernatural levels.
As Spike_of_the_Valley says, his leaping onto the back of Littlefoot's Mother is equivalent to a human leaping onto a horse's back and standing up on the horse's back after the leap.
Also, he does that leap onto that ledge just before the boulder lands on him is at least 100 feet straight up.
A T-rex is 20 ft tall (although The Sharptooth may be larger). The leap he makes 5 times his height (or more).
That is like me (5 ft 4 inches) leaping on top of a 25 ft building.