I don't get mike fright but as yet I've not got the capacity to talk any sense whilst trying to fly and navigate at the same time
More than once have I had the call all sorted out in my head, but once I start to make it my mind goes blank..
Me (to ATC): "G-XXXX C172 from cranfield to yyy 2 POB err blah blah blah.."
Me (To Instructor): "You do it"