The magicians invite one to five persons from the audience to come to the stage. They hand out props to all of them and then demonstrate how to tie a knot on a rope the two ends of which are held in two hands. This trick involves people invited to the stage to a great extent, as in spite of their best efforts and watching movements made by the magician no one succeeds in tying the knot - no one but the magician of course.
Note! The trick involves participation of the audience (one to five persons)