Sometimes I need to open my pressure cooker quickly and not have to wait 10 minutes for the pressure to finally release. This might sound dangerous but I promise you it is perfectly safe. All you have to do is run cold water over the top of the hot pressure cooker and open the pressure valve all the way. Within 5-10 seconds the safety lock is released. Make sure all the pressure is out and you are free to open. It is an amazing trick, I do it all the time!