Corrected entry: In the first movie, the T. Rex always made a big thud sound, but when the spinosaurus walks (it is larger than the rex) up to them at the fence, it doesn't make nearly as much of a sound and surprises them. (00:55:35)
JC Fernandez
13th Feb 2013
Correction: It's not the size of the animal. It has to do with weight distribution and how the animal walks. An elephant walking sounds like a lot of shuffling. But a child scampering can sound very loud.
JC Fernandez