I've been playing for a good 30 years, been in bands, and can improvise well; but whenever I am "put on the spot" I cant play anything that shows my abilities. I get a riff amnesia. For example, I always run into this when I pick up my guitars from being set up. The tech/luthier always plugs me in to an amp and I freeze up. Anybody else experience this? The last time I actually planned some stuff to play Hope everybody is hanging in there with the pandemic.