Complex sentence: Later she, Leonard and Mick use bikes to chase a truck taking the Santini's money out of the city but she and Mick are toppled over by The Flash as Leonard is taken away to discuss the matter of him knowing Flash's secret.
Split into simpler sentences: Later she, Leonard and Mick use bikes to chase down a truck taking the Santini's money out of the city. However, she and Mick are toppled over by The Flash, while Leonard is taken away to discuss the matter of him knowing Flash's secret.