Death by getting sucked into a revolving jet engine or by being ingested (while still conscious) by the Lion's Mane Jellyfish, its bell measuring 2 to 3 metres in diameter?
P.S. The giant version of the Lion's Mane Jellyfish (described above) is mostly found in arctic waters, and I believe it's venom is potentially lethal to humans. I imagine it wouldn't ingest a human being (even though I think it's large enough to do so) but just for the sake of the game, let's just imagine a scenario in which it does, OK?
Here's a pic, by the way:



