 He was hand-picked by William Peter Blatty to perform opposite George C. Scott, who portrayed a lieutenant in the horror film "The Exorcist III", written and directed by Blatty; Bush played his sergeant.Bush has acted opposite Sylvester Stallone in "Demolition Man".Bush also played actor Todd Bridges' father in "Building Bridges", an autobiographical short film about the rise and fall of the child star of "Diff'rent Strokes".