Visible crew/equipment: Throughout the movie, the cables that help the robots V.I.N.C.E.N.T. and Old Bob fly are visible.
Revealing mistake: When Dan Holland, Kate, V.I.N.CENT and old Bob battle Reinhard's robot sentries on the catwalk, part of the bridge the sentries stand on is critically damaged and collapses. In that shot, the sentries are model figurines.
Lieutenant Charles Pizer: V.I.N.CENT, were you programmed to bug me?
V.I.N.CENT: No, sir, to educate you.