When the young doctor demands Nick's ring in payment, Nick smashes him into the wall before giving it to him. Viggo Mortenson really broke the wall when he did this, surprising the crew.
For the shot near the beginning of the inside of a time clock as someone clocks in, an enormous time clock was built by the director and shot in his garage. The paper inserted is about 2 feet wide, and it was shot sideways so that they could just let the heavy stamper drop rather than come up from the side to hit the paper.
Franklyn Ajaye and Nicky Katt both appeared in The 'Burbs (1989); Franklyn Ajaye as Detective, and Nicky Katt as Steve Kuntz, credited as Nick Katt.