Pillow-Jak works in many situations

And if you think that this helpful tool is cool, go to goosegrip.com to see a mechanic's tool that blows even this away...
Oh and the idea here is not to say that the O2 sensor can only be loosened by the use of the air bag, but rather to show that there is tremendous power available in using the air bag in different varying situations should a situation arise where there is no good leverage for using a wrench or ratchet to break a bolt free.