One element of misdirection used by magician Derren Brown is to apparently place subjects into a catatonic state with the use of flashing lights or physical manipulation of the hands or arms. For example, in this video, at about 2:10, Brown appears to make someone lose track of several hours of time by pulling their arm.
In essence, Brown gives the impression here that he is using a technique that hypnotherapists call "handshake induction", which supposedly will put the subject into a cataleptic trance.
Catalepsy or catatonia can be induced with the use of drugs, but I have been unable to discover any medical evidence that either can be induced without drugs.
Is there any evidence that so-called "handshake-induction" or a similar technique has, or can have, a pronounced physical effect?