What will happen to the two witnesses who will preach in Jerusalem during the end times? You would not be well received, just as Jesus wasn't during His Passion.
I would quickly walk to my car, keeping an eye on you making sure you don't come towards me, and keep my eyes down. Then I would call 911 to report a physco. (no offense)
That depends on if you're in a parking garage or a parking lot.
If you're in a parking garage on any other level than the top one, you would hear an echo and know that God is on your side.
If you're in a parking lot or on the top floor of the garage, nothing would happen. And you would be sad. Mebbe even pout a little.
As long as you're not doing that to cause public disturbance, I don't see any problems with it. Personally, I admire that if you say that sincerely instead of trying to make fun of others' belief and religion.