They sell those cans at Costco.  We bought a 3 pack for $6 as a novelty.  It's SUPER easy to make pancakes with them:  just heat up a frying pan, then make a circle with the batter.  We thought it would be cool for a quick school day breakfast.
 
The problem is they don't taste very good.  They have this bitter lemon-y flavor that just doesn't taste right. Not sure if that flavor is intentional or a side effect of the propellant in the can.