At the Toronto Virgin music festival on Sept 7 2008, a fan jumped on stage during Oasis' performance of Morning Glory and was tackled by security. Noel is pushed down at 0:53 at the right of the screen before security takes down the fan. Liam tried to get a few swipes in after the fact. The show eventually resumed, but was cut a bit short.
News sites using this video:
National Post: http://network.nationalpost.com/np/blogs/theampersand/archive/2008/09/08/man-attacks-oasis-on-stage-at-virgin-festival-in-toronto.aspx
Toronto Star: http://www.thestar.com/entertainment/article/492571
Duration: 2min 23sec