I got a model X for a loaner today (yayyy! I've been wanting to test drive one for a long time now), and I'm wondering if it's safe to try to open the rear doors in my tight garage. I've seen videos of the doors stopping short of obstructions. Do they have sensors to check both clearance on the sides, and on the top? Should I feel comfortable testing this in my garage? If I try to stop the doors from opening with my hand will they stop (like the trunk does on my S)? Finally, is there a way to open the a single rear door from the key fob?