I'm looking for a swipe gesture that will allow me to swipe back to my most recently used previous app. I'm running Mountain Lion. That probably doesn't make too much sense so here's my example. When I'm in Reeder (rss aggregator) and I see a post I want to view in Chrome, I switch over to Chrome (via keyboard shortcut within Reeder or clicking the link with the track pad). I would like to set up a swipe gesture to allow me to swipe back to Reeder without having to invoke LaunchBar. I would like just a simple swipe and voila! Back to Reeder. Possible or am I just ridiculously lazy? Thanks all!