An interesting "Real Hair Reflex" from a 1992 joint convention appearance of Bill Shatner and Leonard Nimoy in Sacramento, California to promote Star Trek's 25th anniversary. The event was filmed and released on VHS as The Twenty-Five Year Mission.
Perhaps giving toupee fans a special treat to mark Star Trek's anniversary, Bill Shatner starts by trying to scratch his head (buried underneath the somewhat thick toupee); he then moves to a mini pat-down of the toup, before apparently giving the toupee a scratch of its own (seemingly making no effort to reach down to the scalp). We call this rare confluence of actions "The Triple" - a definite treat.
The Twenty-Five Year Mission is presently up on YouTube in its entirety. Shatner + Nimoy is always a fun double-act to watch.