Complex sentence: To get past the bank guards, Harold brings along Jackie the Lion, who incites panic, and Harold, Wormy and the lion end up on the ledge of a skyscraper, but narrowly avoid plunging to certain death.
Split into simpler sentences: To get past the bank guards, Harold brings along Jackie the Lion, who incites panic. Things take a turn when the lion gets loose, in which Harold, Wormy and the lion end up on the ledge of a skyscraper, but narrowly avoid plunging to certain death.