What cost $50.01 and takes 4 hours??

*Warning: Not for the weak* Any guess'? Friday night, right before we walked out the door to go eat dinner, Baby Girl swallowed a penny. It was not an easy swallow. She choked it down followed by a couple bouts of throwing up. After about 20 minutes I thought she would be ok BUT then she threw up again. So I was afraid it might be stuck in her throat so off to the ER we went. We sat in the waiting room about 3 hours before we got sent back for an xray. By then it had made its way to her stomach. After about another hour to see the doctor we were told that if she gets fever or has lots of pain to bring her back otherwise just "watch for it to pass". YUCK!! If it doesn't pass by Monday she has to go back for another xray to see if the penny may be stuck somewhere! 4 hours in the ER with a $50 deductible and $.01 in her belly....thats what cost $50.01 and takes 4 hours.
*UPDATE*
She passed the penny! Apparently it takes 46 hours. I am thankful that this can now be put to rest. I REALLY did NOT want to have to take her for another xray!