Hundreds of cars and thousands of people invaded Wildwood this weekend for what police are describing as an “unsanctioned” pop-up H2oi car rally that delved into a chaotic scene Saturday night when at least two people were killed. Video from earlier in the day Saturday shows a calmer scene with cars cruising down main roads of Wildwood like Rio Grande and Atlantic avenues, with vehicles doing burnouts as crowds gathered on the sidewalk to watch. But by night, chaos erupted as huge groups of people swarmed the streets, drivers pulled donuts in the middle of intersections and in at least two inc…