3.Perform something easily even without seeing it =able to do something blindfolded

Perform something easily even without seeing it =able to do something blindfolded

Do something easily even without seeing it= able to do something blindfolded

My write ups

Never use this idiom when praising the skills of a surgeon then no patient will go to him.

Best situation is  to test this is on an irritating and egoistic  tourist guide standing near a mountain cliff  by challenging him. “Sir,   can you demonstrate something that you can do blindfolded?”

But let me tell you I have been practicing and doing something blindfolded every day for a few hours in the past 5 decades guess what? Sleep ha ha!