Jurassic World isn't full of unexpected appearances from previous franchise characters, but it does feature a rather bizarre cameo from Jimmy Fallon. When Zach and Gray are using the Gyrosphere, a computer screen in the center console shows Fallon explaining the safety protocols of the "hamster ball", namely the bullet-proof glass that will apparently keep them safe. It lasts maybe a minute and is frankly more strange than particularly amusing, but given how predictable the majority of the film is, it's certainly one of the most surprising moments.