A diamondback rattlesnake bit an Arizona grandfather during an evening walk in Scottsdale, and he was still able to make it back home before going to the hospital. According to AZFamily, Gary Takacs, 66, is recovering and expected to fully heal after spending a night in an intensive care unit. What happened? According to Takacs, the bite happened while he was walking through his neighborhood and accidentally stepped on the snake. "It literally —…