I noticed that when I played Tetris on my phone, time, anxiety, and depression go away. My entire world for the 15 minutes of the game is turning blocks, zooming them down, go on to the next level...turn more blocks, zoom down, go on to the next level...etc etc.
At the start of 2011 one of my new year's resolutions was to stop playing it...and within a month I had a major mental breakdown. All the depression etc that I'd blocked came out in one blurred, dizzying month.
I haven't played it since then, until just about a week ago. I realized it's a better "medication" than most anti-anxiety drugs I've taken. For immediate relief of severe (situational) anxiety, that's what I do (if I have the time...if not, I'm popping pills).