If you dont plan hen problems can and most likely happen. The weather of the day when your filming on location could cause problems like the quality of the work your trying to get and also damage the equipment that your useing as well as the saftey of the crew thats filming.

http://www.youtube.com/watch?v=LZAVVXxvsN4&feature=related

I chose this clip because this was a fail from the news channel because no planning went into getting a good news reporter.