when the larger Wayne/Lex T-7 hits Superman with the Gatling gun, there's an explosion that is reused footage from a scene in which Mr. Eelan blows a vat of hot lead off its support.
When John Irons is testing out his wrist-mounted laser gun, he blows up a few objects, causing an explosion that features reused footage from a scene in which Mr. Eelan blows up a vat of hot lead from its support.