The defiance of the chain noun comma rule (he ate pancakes, eggs and tomatillo salad) by substituting a conjunction, such as and or or. Lions and tigers and bears, oh my. An excellent way to heighten reader tension, and followed by a throwaway word, brings things to a screeching halt. It can be used with clauses also. However, if the clause is too long, the effect is dissipated, i.e. Virginia Woolf's never ending sentences.
Edward C. Patterson