The Vacuum Cleaning Sky

It was a normal day. A group of 4 friends resting at the shore, chilled beer cans, some gossips & the social network feeds. Suddenly, there's a roar from the sky, a roar loud enough to rupture the eardrums. Their ears started to bleed. Panicking, when they turned towards the direction of the sound, they witnessed the abnormal. The sky had opened, extending a filthy tunnel-like structure into the sea. & in no time, the tunnel started sucking everything from the sea, it's creatures, the plants, the ships & finally the whole sea. It din't even take 5 minutes before it was all gone & the sky closed back. Like a vacuum cleaning, everything was sucked up leaving behind no trace of any sea. Before they could think of anything, their hearts pumped with great force & all of them died instantly.