My friend and I had stopped to have a late dinner and chat at one of our local parks. My attention was drawn to movement in the passenger side mirror. I realized there were what appeared to be several "heads" coming out of the grass behind us. Some appeared to be speaking. One in particular was almost directly behind the passenger side mirror. He appeared to have an urgent message, but I never heard a word. I started to tape him as quickly as I could and continued to do so until he simply vanished into thin air. There are several other "heads" that also seem to be speaking, but not as urgently. My recorder never picked up any voices or sound other than what I made.