Check this out from SeriousMaleBondage.com:
Computers and advanced image recognition systems provide continuous monitoring and evaluation of patients during their bondage therapy. If the patient struggles, the system will automatically tighten the straps! Seriously though — guys like to see themselves in bondage. In this scene they rigged up a video monitoring system so the subject can see himself, and they can monitor the same video feed in the other room.
Check out the video coming soon on SeriousMaleBondage.com.