After careful study of the ending of the original (and arguably the only good) Jurassic Park movie, I have decided that slapping it on the wrist by labelling it an obvious Deus Ex Machina is simply not enough. That velociraptor is in the air, when the massive T.Rex snatches it cleanly in mid-flight. Where the lumbering beast came from we aren't sure. I guess without glasses of water handy, nobody can feel its approach.
Anyways, I pronounce this scene a Deus Ex Tyrannosaur, which I think better describes the situation. As a general rule, in reality, T.Rexs don't appear inside buildings to snatch velociraptors mid leap, saving the heroes.
Needless to say though, it makes for compelling entertainment.