In Stage 1, he is the second dinosaur that you see. It is very hard to escape unhurt during the short run in stage 1. However, you can stay alive no matter what, unless you stop while he is chasing you. In Stage 8, he is farther away and you can easily run away without being hurt. However, this run is very long and the Spinosaurus is not the only thing that can hurt you. When he gets stuck at the boxes he will start throwing them at you. There are also holes which you must jump and Blue Raptors which you must avoid. The easiest way to do all of this is to run straight through the middle. The only thing you will have to do is jump the holes. Do not stop running, even to defeat the Blue Raptors when Spinosaurus is stuck.