One of the freakiest natural events I've been involved in was the https://en.wikipedia.org/wiki/2016_Kaikoura_earthquake. It was a long rolling earthquake that went on for a while at midnight.
I'm not even on the same island that it happened on. I was hundreds of kilometres away from the epicentre, but it still had an amazing strength to it.
Of course it had to happen at the time I was watching porn.
High seas while out on the sailboat. I don't know if that's freaky, but the power of water is amazing and can get scary.