Supersaturated gas solution
Every can of soda, coke etc. is supersaturated with carbon dioxide after opening, i.e. relieving the pressure in the can. 

The surface tension of a gas bubble adds to the outside pressure, and more pressure always increases solubility of gases, as you know from Le Chatelier.

Same with gas supersaturated with a condensable gas or solvent with too much solute, you have to overcome the surface tension of small particles or droplets before precipitation can take place.