Kally and Grumpus react to the Scariest Siren Head and Other Monster Sightings! It's so Creepy!! Be sure to check out @grumpusreacts2855 and our new channel @meatball3766 Subscribe for more scary siren head videos! In today's extremely creepy reaction video, Kally and Grumpus check out the Scariest Siren Head and Other Monster Sightings! This episode features some of your favorite monsters around including Siren Head, Cartoon Cat, and many more! Be sure to watch to the end and let us know which of these scary Siren Head and Other Monster Sightings you thought was the most creepy! Videos we have watched recently: @PrestonPlayz - I Found SIREN HEAD in Minecraft! youtube.com/watch?v=FnEjUk4trlE&t=21s @BriannaPlayz - We Found RED Siren Head in Minecraft... youtube.com/watch?v=K1pDzDp2Pjk @infinite - The Scariest SIREN HEAD Movie On YouTube.. youtube.com/watch?v=26mgMdtfuXE @ReactoryMeatball - SCARIEST Siren Head Sightings In REAL LIFE w/ Other M...