A prisoner was cleaning the walls in his cell with a flannel... ...when the prisoner in the next cell asked if he can use it. ""Sure,"" the first prisoner said and he gave him it. This struck up a conversation and the first prisoner asked, ""So how did you end up in here mate?"" ""Well,"" he replied, ""It's a funny story. I was low on cash and saw a guy walking down the street and mugged him. Stole his money and everything. The sad thing is though, he only had two pence, so basically I'm in here…