This is a clever trick, and it requires two persons. The idea is for
the confederate out of the room to correctly name the individual over
whose head the other person is holding a wand.
A person takes a cane, which he carelessly points toward some one;
while so doing he is cleverly explaining what he is about to do, asking
people to move, in order to further mystify, etc. The confederate
notes where the cane is pointing, then goes from the room, and the one
holding the wand puts it over several heads, saying “Over,” which the
confederate echoes, until finally the question comes, when the wand is
over the person before surreptitiously pointed out, “Whose head is it
over?” The confederate’s answer is naturally correct.