Many Houdini ripoff escape artists have since pulled off the escape from a straitjacket routine. This is often done, as you would probably guess, by altering said jacket before use. The arm holes are extremely deep, enough so that the escape artist can pull his full upper arm through there. A slightly more conspicuous trick is to make the belts at the ends of the sleeves in such a manner that they can be drawn into the sleeves during the fastening process. In this manner, the escape artist gives himself more slack.