Dinosaur Attacks

In this video, I like that after man is eaten by the T-Rex, he spits out the guy's hat.  I added an explosion when he rips the car into pieces.  The explosion was part of my software.  I am trying to add a dinosaur roar at the end.  I haven't yet learned how to make this happen in my software.  I may need a different program, better software to make it happen.  I changed the rate the pictures appeared when the dinosaur roared and when the car moved to make it more realistic.

I would like to have the dinosaur walk better.