The U.S. Geological Survey (USGS) is warning people not to try to roast marshmallows over a volcano.

A Twitter user asked the USGS Volcanoes Twitter page if it is “safe to roast marshmallows over volcanic vents? Assuming you have a long enough stick, that is?”

“We’re going to have to say no, that’s not safe. (Please don’t try!.),” the USGS responded Tuesday.

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The USGS took time out of providing updates on volcanic activity to point out that marshmallows roasted over volcanic vents would also taste bad.

“If the vent is emitting a lot of SO2 or H2S, they would taste BAD,” the USGS added. “And if you add sulfuric acid (in the vog, for example) to sugar, you get a pretty spectacular reaction.”

Erm...we're going to have to say no, that's not safe. (Please don't try!) If the vent is emitting a lot of SO2 or H2S, they would taste BAD. And if you add sulfuric acid (in vog, for example) to sugar, you get a pretty spectacular reaction. — USGS Volcanoes (@USGSVolcanoes) May 29, 2018

The tweet comes after Hawaii’s Kilauea volcano began to spew lava in recent days.

The volcanic activity has created clouds of ash and flowing lava, made nearby areas uninhabitable and also created volcanic vents. Those vents emit high levels of sulfur dioxide that carries health risks.