How Lenny Chookoo lost his arm

A bunch of us at work were having lunch together when I asked Lenny Chookoo how he lost his arm. He told me that it got caught in a subway train door and wrenched off when the train dragged him into the tunnel. I laughed because I thought he was joking, but stopped when I noticed no one else was laughing. When I stopped, they all started laughing at me, because, apparently, it was funny to see me in discomfort. Then Lenny Chookoo had a heart attack and died and everyone stopped laughing - except for me. I laughed and laughed and laughed and laughed. "Who's uncomfortable now?" I asked the group. True story.