An Ohinemutu resident was woken up to the sound of a massive geyser of water shooting tens of metres into the air from Lake Rotorua.
Lani Kereopa posted the video to her Facebook of her describing what happened to her.
She said there was a 'big thump and spraying sound afterwards' and then said "Twenty-five metres from my house a geyser was erupting out of the lake".
Scary stuff - stay safe down there Rotorua fam! Let's hope it's just Mother Nature being a bit random and a one-off situation...