Oh wow... I'm glad you're ok and nobody hit your car. That does sound scary!
And... I just wanted to say, I have the same problem of bringing things up that bother me in therapy. A few weeks ago, I had a whole list of things

that I had posted here. I ended up printing it out and handing it my T. I don't actually remember saying much, just sort of being like "please read this!"
I think it was helpful... we'll see. But yeah, if you can manage to say something in the moment, that would probably be helpful. The shoe thing DOES sound bizarre... I think I'd have to ask something like, "is there a problem with your shoe?" which would hopefully make T realize what she's doing.
Good luck with it!!!!