I was deep in meditation at what I call my 'nothingness' stage when a really loud high pitched noise went rushing through my head with a visual bright flash of red. It came from nowhere, lasted a second and made me flinch. I managed to stay calm and continue in the 'nothingness' state for a little while longer but then had to come out of it as my mind started focusing on it.
I've had weird energy surges for the past couple of days and whilst I'm not sure what they are, I've had them many times before in the last 4 months or so.
What do you think it could have been?
I didn't find the right solution from the Internet.