Simple enough - someone posts the above sentence, with something on the end. The next person answers and posts another sentence. Eg:
Person 1: Who would you like to see...amusingly covered in bird crap?
Person 2: Margaret Thatcher
Who would you like to see...?
Etc.
It can be anyone - celebrity, fictional character, forumite...
So, to begin - who would you like to see...turn into a forum smiley?
ross doin his trade mark evil eye!
who would you most like to as a large plastic monkey maker
Jamie
Who would you most like to see on trial for murder
Staddon. I don't know why, it's just a funny image.
Who would you like to see spontaneously combust?
yer i would like 2 see jamie. he's my bro!!!!!!!!! or mayb i would like 2 see jebus!!!