She might mean unconsciously?? People have prangs all the time and if both of your cars are there at the same time...

I once took my wing mirror off my car on his drive... luckily it was just my car that was damaged!

What's more worrying is that you left your session in a dissociated state. Your T needs to help you come back to yourself before you leave... it's no wonder you had an accident. I'd be angry with her for not doing her job properly.