One detail of the David Thompson seances that has drawn some comment is a trick involving his cardigan sweater. Before each performance, Thompson has the buttons of the sweater tied into the buttonholes with cable ties. When the performance is over, the sweater is sometimes found to have been "reversed."
I originally thought that the sweater had been turned inside out, but apparently "reversed" means simply that it is worn backwards, with the front buttons now on Thompson's back. Either way, however, the trick is no big deal.
It is easy to turn a sweater inside out without unbuttoning it. Try it yourself. (I did.)
And of course it's even easier to slip out of a sweater and then put it on backwards.
But, Thompson's supporters will say, how could he take off the sweater when the buttons are tied into the holes? Most sweaters are flexible enough to allow you to pull them off and on without unbuttoning them. After all, many sweaters have no buttons at all, and are intended to be pulled on and off over the head.
The cable ties prove nothing except that the sweater remained buttoned throughout the act. (Technically, it is possible to undo a cable tie by slipping a pin into the locking mechanism, but there would be no need for Thompson to do this.)
Of course, the "phenomenon" is considered significant by Thompson's fans. Why? Because they assume that he remains secured to the chair at all times. If this were indeed the case, then it's true that the reversal of his sweater would defy normal explanation.
But if Thompson can slip out of the cable ties that hold him to the chair, then it is simplicity itself for him to pull off his sweater and put it on backward. Apparently it's never occurred to the dedicated investigators in charge of the Thompson seances that the "medium" uses a sweater precisely because it is expandable enough to be pulled off and on without being unbuttoned.
If he really wants to demonstrate paranormal powers, he could try being secured in a dress shirt, with the front of the shirt tied shut, all the way up to, and including, the collar. Assuming that the collar is reasonably tight, he would probably find it impossible to extricate himself from the shirt without unbuttoning it.
Anyone think he's going to do this? If so, I have some New York real estate to sell you.