. welcome back to "caught on camera." on a fourth of july display, you expect to see fireworks but not like this. spectators were left scared, scarred and wanting to know what went wrong. in southeastern pennsylvania, a celebration goes from festive to fearsome in a blink of an eye. >> oh, my god. >> what the -- what the -- >> july 4th, 2010, the town is celebrating more than american independence. they are also celebrating their home town's big birthday. lifelong natives look forward to the evening festivities. palmyra was celebrating and it was a big deal for the community. >> the night will be topped off by a fireworks display at the buck swank football field, a