1999 Ford F-250 Stripped Spark Plug

I had my truck shoot the spark plug out of the #1 cylinder 1) I am wondering what could have caused this? 2) I am trying to make the repair with out removing the head while I understand this is risky because retapping and using a rethread kit can cause metal shaving to fall into the cylinder I believe if I can get it to the exhaust stroke I can blow most of them out with an air compressor and I also have a vacuum I can use to try and suck anything else out. I was just looking for any other suggestions or solutions.