Have you ever experienced a shared hallucination?

People like to think that if more than one person saw it than it must have been real. I beg to differ. My mom was on the road with some friends in Texas. They were the only ones on the road and you could see at least a mile every way. Everything was barren. A semi truck appears from no where full speed toward them honking it’s horn. Just when it’s a few feet away all 3 friends close their eyes. When they open them a few seconds later the semi is gone. Nowhere in sight. I believe it was a shared hallucination. Has anyone here ever experienced something like that?