Multi-colerd well defined beam or flash

My fiancee and I were sitting in our 1 story apartment in Augusta GA when the following occured. We were in our living room with the tv on and a light on, the room was bright. We had covered our window months ago with a thick black-out curtain because we wanted the room dark because we both had a habit of sleeping in our recliners and liked it dark in the morning so we could stay asleep. This curtain was closed when, while we watched tv, we both turned to the left toward the window at the same time and saw an intense flash of light that seemed to be white/yellow and then turned blue. This light did not illuminate the room but was defined with clear edges on the curtain. Imagine someone cutting on a 500000 candlepower ligt and pressing it firmly to the window. This all happened in an instant and we turned to each other and said "did you see that?" Something had made us turn toward the window at the same time. WEIRD My theory is that some et was"reading"us with the flash. Who knows.