How to Drop a Tumbler on the Floor Without Breaking It.
This requires a steady hand and smooth table. You simply set a tumbler upon a table near the edge and gently push the tumbler with your forefinger until it is very nicely balanced upon the edge of the table. Now by giving the tumbler a very gentle push again it will fall to the floor, striking upon its bottom edge, and remain standing either upon its bottom or lying upon its side perfectly sound. Be careful and have no covering upon the table, as the less friction you can get the surer you are to perform your trick.