On Tuesday, October 2, 2018 at 1:06:52 AM UTC-10, Ophelia wrote:
>
> I am with Ed on this. I always place it in the sink and run cold water over
> it until you hear the pressure dissipate.
>
> Only then do I take off the lid. Btw mine is very old fashioned and it has
> no safety lock.

I have done that too. It would be safer to let the cooker sit on the stove to let the temperatures equalize in the pot. Doing a fast cool down can result in areas of large delta t which can cause your roast to explode!