Hot iron looks like cold iron. So, if you take the lid off a Dutch oven using a hot mitt, do not attempt to put the lid back on with your BARE HANDS!
The dilemma you face will be whether to place the lid down on the counter gently so as to not damage the counter, or drop the thing so as not to damage your hand.
Warning: Mentally debating this issue will cause you immediate and escalating pain!
That is all.