WATCH: Humpback nearly knocks woman out of kayak with tail

MONTEREY BAY, Calif. -- A group of kayakers were treated to an amazing (and heart-stopping) close encounter with a humpback whale earlier this summer.

Cimeron Morrissey posted a video and briefly wrote about the encounter on YouTube.

"While kayaking in Monterey Bay and watching a huge raft of sea lions that had come up right in front of us, a bus-sized humpback whale suddenly rose up out of the water only 10 feet from my boat," wrote Morrissey.

Morrissey said she wasn't scared at first because she said she knows that the whales are graceful and fully aware of their surroundings.

But she said she was shocked when the whale swam up to her kayak and then dove right underneath it.

"Then his back arched and came to the surface about 3 inches from my boat, which freaked me out a bit," she said. "Then his enormous barnacle-encrusted tail came out of the water and was about 12 inches from my face, which pretty much made my eyes pop out of my head. "

Morrissey said about a minute later another humpback came up and dove right next to her friends' kayaks as well.

WATCH THE VIDEO BELOW (WARNING SOME GRAPHIC LANGUAGE)