Cricket (as explained to foreigners)

"There are two sides, one out in the field and one in.  Each man that's in
the side that's in goes out and when he's out he comes in and the next man
goes in until he's out.  When all the men in the side that's in are out,
the side that's out comes in and the side that's been in goes out and
tries to get those coming in out.  Sometimes you get men still in and not
out!  When both sides have been in and out including the not outs, that's
the end of the game."