Complex sentence: Janice won by isolating Cilla's big pudgy beer belly as it was a weak spot and it knocked the wind out of Cilla, then Janice pulled Cilla's skirt down in front of everyone in the street.
Split into simpler sentences: Janice won by isolating Cilla's big pudgy beer belly, knocking the wind out of Cilla. Janice then pulled Cilla's skirt down in front of everyone in the street.