I would explain it as "hit by pitch" in baseball, but it counts against the batter instead of the pitcher (bowler). In baseball terms, both the batter and pitcher are more mobile, so the batter has a responsibility to get out of the way or reposition to make the hit / protect the wickets, so it makes sense in both cases.

I've had some success explaining it as "baseball, but 360 degrees and most things are a hit instead of an out". In MLB the best batters have a batting average of something like north of .300 while in cricket you're probably looking at something above .900