Cool PSA examples

http://vimeo.com/44771466

http://youtu.be/-0npCWBznko

http://www.youtube.com/watch?v=dBbmc3EPht0

http://www.youtube.com/watch?v=4Yq9_2HhIQM

http://www.youtube.com/watch?v=9zKXCQpUnMg&feature=related

http://www.youtube.com/watch?v=vWbXBThY1Jw&feature=related