I don't recommend trying it unless you don't plan on using your arms for anything the next day (like washing your hair or putting your seatbelt on).
It really wasn't that bad. I plan to do it again (when I can raise my arms above my waist without crying). I would like to change it up a little though. Perhaps instead of crunches, I could do leg raises or bicylces? Or add weight to my crunches...?