What I love about this scene is the fact that Wilt decided to grab Mac as they jumped down the tunnel. Mac was the only human amongst four imaginary friends, who would probably stand a better chance of surviving the landing while he, a two foot 8 year old child, wouldn’t.
Wilt’s protective older-brother instincts that date back to his days with his creator, Jordan, kicked in here and he didn’t want Mac to be hurt, not if he could prevent it. Just one more reason why I adore Wilt. <3