hobosynthesis
The process by which transients and other urban outdoor expiditioners generate carbohydrates and oxygen from carbon dioxide, water, and light energy into energy enough to wake up and move around.
The sun came up and warmed the hobo enough to move from the park bench to the soup kitchen. Obviously, there was some sort of chemical reaction from the heat of the sun that converted the starches from the potato vodka into energy via hobosynthesis.