That's interesting. My brain does the same in terms of attempting to simulate that model of the people, but when it becomes impossible to run the algorithm (too large of a group), instead of just giving up, my brain goes into panic mode. I have found propranolol helps me with many of the physical symptoms that would otherwise dominate.

I agree regarding audience size and add the factor or preparation - no way am I going to speak to a large audience without solid prep. That helps me a ton, feeling prepared and rehearsed.