Terrified of car mirror

For the longest time we didn't have a mirror on the headrest in the back seat of our car because we could never find one that fit properly and allowed us to see LO from the front. I finally found one that works well, and I thought LO would love it because it's colorful, has these little stuffed fireflies on it, flashes different color lights, and plays music. He HATES it. And I mean hates it. I think the stuffed fireflies on the bottom scare him to death. I put it up in the parking lot when I bought it the other day, and he wailed the whole way home (he usually loves the car). Cried yesterday morning during our commute. This morning when DH and I took him to run errands I had to sit in the back with him because he was, again, screaming. Took him out by myself this afternoon and he screamed bloody murder to and from our destination. Looks like this one is going straight into the trash! Lol! Does your LO have any toys that scare him/her?