What a nice story...
"Al was announced to the crowd but never appeared. It turns out that this little old lady was in a wheelchair and couldn't see the stage very well. Al Green pretty much refused to perform until the NOPD helped this woman onstage so she could see everything. It was without a doubt the best moment of the day. "
http://blog.nola.com/wwoz/2008/04/tears_at_al_greeen.html