Not to dwell on it unecessarily, but it wasn't that bad. My doc said I could do it the easy way ("use" the entire day before) or the quick way (the overnight human volcano method). I took the easy way upon his recommendation. I had to remind myself that I wasn't 'simply sick'. Not being able to eat for an entire day was actually worse than anything else, IMO. By bedtime I was done and got a good night's sleep.