Robert A. Silverman is a Canadian actor cast five times by writer/director David Cronenberg. He is sometimes credited as Bob Silverman or Robert Silverman. Wikipedia
eXistenZ
(D'Arcy Nader)
Naked Lunch
(Hans)
Scanners
(Benjamin Pierce)
The Brood
(Jan Hartog)
125 Rooms of Comfort
Rabid
(Man in Hospital)
One Night Stand
(Nick)
The Ruining
(Henry)
Partners
(Hayes)
Jason X
(Dieter Perez)
Prom Night
(Mr. Sykes)
984: Prisoner of the Future
(Prisoner)
Caressed
(Al)
Waterworld
(Hydroholic)
It Seemed Like a Good Idea at the Time
Friday the 13th: The Series
(Jerry Scott)
Friday the 13th: The Series
(Archie Pierce)
Twice in a Lifetime
(Homeless Man)
Pacific Blue
(Gottfried Weber)