I take pride in clear and effective interpretation, not in myself. If I am messing up don’t bother whispering in my ear, just take the microphone from me, fix the issue and keep going until I am ready to take it back. I will not be offended, I will be grateful.
(I give this speech to interpreters with whom I am working for the first time. The trick is, if you say it, you have to mean it.)