The slow half-shower is a three ball pattern that repeats every four beats. You can apply the transformation rules to 3333 to find three ball patterns that repeat every four beats. Here are the steps that lead to the slow half-shower.

3333  5313 By the downright rule.
5313  5223 By the downright rule.

This last pattern, 5223, is the slow half-shower. This is a very easy pattern, which shows that you don't have to be a five ball juggler to perform patterns that have throws to height 5.