The USGS had been answering questions and providing regular updates on Hawaii's erupting Kilauea volcano on Twitter, when it got this curveball from Jay Furr in Vermont.
He wanted to know if he could roast marshmallows over the volcanic vents!
No! No you can't! And here's why!
SO2 and H2S are toxic gases emitted from volcanic vents, which would make your marshmallow taste pretty awful.
Sulphur dioxide has an odour similar to a just-struck match and hydrogen sulphide is the gas that makes rotten eggs smell bad. So yeah, not a great combination.
For more information, click here.
(Photo: Getty Images)
Jack and Carolyn talked about it on the air. Listen here: