Same thing happened to me about a month ago. Only I had planned to process 2 roos. The first one, I cut and although he bled it didn't cut deep enough. Found out with that experience, you need a VERY sharp knife (typing this I think I will check out a knife store maybe, I've always thought those were where serial killers shopped lol).
Anyways, this 1st roo, as I was looking around for a sharper alternative, he jumped out of the makeshift killing cone (note to self: always wrap the legs together) and needless to say was trying to hide from me all over the yard. Finally got him back in and finished the deed with a tree branch pruner. I felt real bad that I wasn't able to end his life quickly, as I had planned. It was so draining, that I didn't want to process the 2nd roo that day. He's still alive, and if the day ever comes for him to go (which it may), I'll find it very hard to do, because he's my little buddy, always follows me around the yard. That was my first and so far only time processing a chicken.