Two Irishmen are sitting in a bar...

Two Irishmen are sitting in a bar. Mick's looking particularly sad and Patrick asks him what the matter is. mick says, "well, I knew that my grandfather had died in the war, but I've just found out that he actually died in the auschwitz concentration camp." Patrick says, "that's terrible, did he go to the gas chamber?" and Mick replies, "no, he fell out of the machine gun tower."