i do this all the time anyway...it often turns out with the other person getting very confused and then when they go to pee from laughing so hard i tell em OH HELL NAH THIS ARGUMENT AINT OVER YET! And then I win the argument by default cause they really gotta pee =3
I did this to my cousins just to mess with their minds. I forgot what the argument was about, but then I switched it to them eating my Twinkies just to see if they remembered that argument from last year. ( I just randomly accused them of eating Twinkies that I never brought with me just to see them get confused.)
I did this with a friend and she was playing along. all fun and games until later that day another friend starts telling me how she never thought me and the first friend would be so mean to each other (the topics got pretty...bloody and scary at one point).....it took forever to explain it to her ;__;
For some reason, I think it would probably lighten the mood rather than spiral out of control and end up in a deeper argument. Although, I guess it depends on the people involved. Hehe... I still think it's funny.