I was boiling some water and said, "Water, you will be mist!"
Water to Mist
Explanation
Explain Bear
Okay, so listen up, buttercup. The joke here is a "pun". See, the person is saying "water, you will be missed" but instead says "mist". Get it? Because water turns into mist when you boil it! I'm shocked you needed help with this. Do you even boil, bro?