"Takedown" I personally think this word is used by somebody relatively new to mental health. I work on a secure unit. We undergo Prevention and management of aggressive behavior trainning sessions every year and have a least restraint policy. De-escalation techniques are taught in small groups, and in case we have to restrain a patient the assigned nurse always takes the lead followed closely by security or other clinical staff. Every situation is unique and there is no standard response, just ensure patient and your safety. and yes we definitely function as security with no additional pay.