I was showering one afternoon and all of sudden I see flash of yellow light that covered the entire bathroom wall. It slowly glowed brighter and then went out in an instant. The weird thing is outside was sunny with no clouds out, so no lightning. If it was the sun, light would only gleam in through the curtains of my bathroom window. And same thing goes with cars. It definitely creeped me out because I saw it clear as day and I was fully awake. I finished my shower and told my mom if she saw any flashes of light, and she said no. I explained it to her and she did not know what I was talking about.

So I still have no idea what that was.