The Dilophosaurus killed Nedry and then they got his glasses and then found spare glasses.Some Dilophosaurs actually have a sunglass on them.In jurrasic park they wandered so far later then they survived a Megalodon attack and swam ashore meeting a player.The player died shortly and his remains were just a body and a few gear.At first it seemed easy until a giant Tyrannosaur came.Now they changed and run away when they feel dizzy.They became slightly less aggressive and weaker with more spikes. Very strange if you ask me.