Imagine you're on the 'phone, driving, operating heavy machinery, surfing the web, but you need to open a coke (or beer)... What do you do? Simple:
- Grasp the can firmly at the top with your thumb and middle finger.
- Slide your index finger under the ringpull, and pull it back as normal.
- Pull your index finger all the way back, and flick the ringpull back to where it came from.
It's also possible to do this with your middle finger and ring finger/pinkie, if your hand is too small to comfortably use your index finger.
There are many ways of opening a can with one (or fewer) hands. If you're feeling creative, be as violent as you like. Just remember, If you want to get rid of the bathwater, you've got to throw out a few babies.