Impossible case

<p>
The magician shows the spectators a tiny briefcase. He puts it down on the table, opens it up, and produces a full size real golf ball from it. The golf ball is much bigger than the brief case, and it seems impossible that such a large ball could be produced from such a thin case.</p>
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&bull; The plexiglas briefcase measures cm 10 (l) x 2,5 (h) x 6 (w).</div>
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&bull;&nbsp;Only the briefcase is supplied. You can produce various objects from it as long as they are the correct size to work with the case.</div>