Looks like Andy Dick may finally be pumping the brakes after his terrifying overdose ... 'cause he was spotted looking healthy and happy during a bike ride around L.A. TMZ obtained this clip of Andy not long after wrapping up a 50-day rehab stint -- he was cruising through the L.A. streets Tuesday morning, putting his health first with a spot of cardio. Andy appeared upbeat and relaxed, chatting it up with a buddy as they rode through a quiet residential neighborhood ... a pretty stark contrast