towers. everybody move back. >> when producers set out to capture woodstock on film. >> watch those towers. >> they had no idea it would be part concert, part disaster movie. >> keep your eyes on the towers. >> when the storm came on sunday right after joe cocker. joe turned around as he came off stage and saw this huge black cloud coming and he said oh, my god, did i do that? and then it hit. there were lots of those kinds of moments that are dramatic and you just have to have faith that you're going to get through them. >> so maybe it's fitting that half a century later ominous clouds are building over little