I have a hard time singing, "Come tripping down the stairs, pretty Peggy-O". And ever since a friend of mine sang "Banks of the Ohio" with his imitation of a Buck Owens accent, I can't keep a straight face. He pronounced it, "Buyinks" with a rather explosive "B".

Another friend used to sing, "Lilly of the West", ("Flora"). And just after he sang the line, "I stepped up to my rival, my dagger in my hand." he would let out with the evilest of laughs. I still hear it every time.

BSeed mentioned, "The Green, Green Grass of Home". After I heard someone recite the lines in an imitation of Bob Dylan, the song was never the same.