Cutting metal roofing quick and easy

Not rocket science here and use your own judgement. Just showing an easy way to cut metal roofing or siding. I forgot my corded Makita saw so used a 20V dewalt I had in the truck. Worked fine but make sure you have a fully charged battery, more power the better. You will ruin your blade for wood cutting doing this. Would be better to have the whole sheet fully supported while cutting.