Maskelyne presented a version in England, as early as 1865, to prove that he could outdo the Davenport Brothers. He would curled inside a small wooden box, which was locked, covered with a canvas and laced, then escape. 
Some add a kicker ending by doing a costume change.
Penn and Teller performed the illusion in an underwater theater with the woman assistant handcuffed & locked in a steel cage on the bottom.
Criss Angel performed it using a flash of fire as the cover.
A method for Metamorphosis was exposed by the Masked Magician, Val Valentino, as part of Fox TV series Breaking the Magicians' Code: Magic's Biggest Secrets Finally Revealed. He was assisted by Michelle Berube. However, the method exposed (specifically the manner in which the trunk is opened) is not generally in use today.
- ↑ Houdini! by Ken Silverman, 1996
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