Just like most comedic writing, the rule of threes in comedy relies on building tension to a comedic release. In the case of the rule of threes, tension is built with the first two items in the pattern and then released with the final item, which should be the funniest of the three. Most triples are short in length, often only two or three sentences, but the rule can also be implemented effectively at longer length as long as base formula is still followed.