To perhaps testify to the fact that I have spent my fair share of time in blue rooms (not to necessarily hijack the thread), cooking, freezing, and trying to get out as soon as possible, and to perhaps offer some advice to others, take note of the following.
Have you ever sat in one of those things and heard the back up horn from a crane very nearby, and getting closer? It is not unheard for an Operating Engineer to have his head up his,,,,,, and with his outriggers knock one over with somebody in it. Remember, these guys respond to hand signals, so if they're not get any they won't stop.
So, if this happens to you remember this, if you have a pocket knife you can poke a little hole in the wall of the blue room. This little hole makes a terrific aperture as a camera. Then you take some of the paper that hopefully is available, and hold it up in front of the little hole. You will now see an image of whatever is on the outside, so you can keep an eye on that apprentice OE as he's backing up and coming toward you. Of course the image will be upside down, but who cares. When the image gets big get the heck out!!! Then you will be around to give the OE a differnt kind of hand signal.
Just a little advice from your old friend js55.