Maybe you need a "minder" with you to take care of you whenever and where ever you do drop off into that coma. Make sure it is someone with a car. But, something funny happens with sleep deprivation--it is amazing how much energy you can have on less than 5 hours of sleep, night after night after night. Adrenelene kicks in and you are good to go indefinitely. I lived like this for 18 months. Of course, when I look back over some of the things I wrote during that sleep deprived period, I wonder how coherent I sounded to the people around me.... But, you can most definitely do it!

Holy! 30 straight hours and counting with no sleep! Don't know how you did it. If I did that there's no way I would have been able to squeeze in an exercise. Actually I would have fallen asleep at the 20 hour mark.