This is a very solid point, but how did he manage to do the act while tied up in a pickle suit and on suicide watch?
Forgive me if I'm not mistaken, but he was under the supervision of two guards specifically because they understood the high risk he was at, so they took precautions to prevent it.
Was he just that competent that he Houdini'd himself out of a super straitjacket and managed to expediently end himself under 24/7 supervision?