This one is a throwback, but it came to mind today so let's do this.
You can receive 1 million dollars with no tax right away, but an immortal, uncontainable, unsealable, intelligent snail will spawn somewhere random and start crawling towards you. If it touches you then you die.
-You cannot get rid of the snail.
-Anything that crosses it path will die.
-It can also shapeshift and adjust it's physical form to reach you.
-You do not know it's location unless it's within your eyesight, but the snail knows where you're at all times.
-If you try to leave the Earth's atmosphere or find a way into an alternate reality it spawns on top of you immediately resulting in an instant death.
Do you take the 1 million dollars?
I personally wouldn't right now based on my current situation; however, if I was living paycheck to paycheck or much closer to death than I would take up the offer.