Some damn fool

There are these two men, Joe and Bill, who work in a sawmill.
One day Bill accidentally saws off his arm. Joe scoops it up , places it in a plastic bag and rushes Bill to the local hospital. Using the very latest microsurgery techniques they sew Bill's arm back on.
Three days later Joe goes to visit his friend and is amazed to see him playing tennis.
"Wow" he says "Aren't these new medical techniques just wonderful"
Then Joe accidentally saws off his leg. Bill scoops it up , places it in a plastic bag and rushes Joe to the local hospital. Using the very latest microsurgery techniques they sew Joe's arm back on.
Three days later Bill goes to visit his friend and is amazed to see him playing football.
"Wow" he says "Aren't these new medical techniques just wonderful"
Finally Bill accidentally saws off his head. Joe scoops it up , places it in a plastic bag and rushes Bill to the local hospital.
Three days later Joe goes to visit his friend and asks how he is.
The doctor says,

"He's dead. Our new microsurgery techniques would have saved him but some damn fool put his head in a plastic bag and he suffocated"