Twin Peaks, 2 crying scenes
This one is very dramatic and effective in terms of expresiveness but it's short :
http://www.youtube.com/watch?v=ulMSwnktFi4
http://www.youtube.com/watch?v=lXCl4AwTNb8
''I like crying. And now I not only wanna cry and show my crying to other people, I wanna just split myself down the middle and open my guts and just throw everything out!''
Woody Harrelson