@flyingpig Considering she set it at the end to make her skip an entire day and not realize she slept for over 24 hours I'd go ahead and say yes, you could. But you'd probably die of dehydration and/or starvation in the process.
Would be useful to have a alarm clock on your head if having trouble sleeping but imagine accidentally set for 80 hours instead of 8 hours as the amount of sleep.