My boyfriend was looking outside and called for me to come look, I ran outside and there were two large circular fire ball looking lights in the sky, they darted around erratically and would glow very brightly then get dimmer. The second ball merged into the first one and it glowed very brightly and then dimmed and then looked as if it evaporated completely. I waited for a few minutes but it never came back and I saw nothing else in the sky. I saw a regular plane fly overhead maybe 5 minutes later and recognized that immediately. While watching the light I felt mezmerised and curious.