There was a lot of discussion about this in the match thread, while I thought it was very clear. So here's to you all: one or two bounces?
Video: http://www.tenniztube.com/video/1824/federer-s-fantastic-lob-2014-australian-open
Video: http://www.tenniztube.com/video/1824/federer-s-fantastic-lob-2014-australian-open