Filmmaker Michael Moore is threatening to start fracking off the coast of the US President's Mar-a-Lago resort in Palm Beach in Florida.
The Bowling for Columbine director is responding to the White House's recently unveiled plan to open up huge sections of the California coast for fracking.
The threats don't seem to be idle, with the filmmaker posting Twitter pictures of the fracker he plans to use.
"Here's our fracker!," he commented. "We'll be drilling right off the coast of Mar-a-Lago.
"God Bless You Donald Trump for making this possible! The oil we drill just off your beach will pay 4 our entire show!
"And any spills - we're going to let the ppl of Florida keep whatever they collect 4 free!"
Fracking is short for hydraulic fracturing. It's an industrial process that breaks apart rock formations deep underground to extract fossil fuels like oil and methane gas.
The practice is widely believed to be environmentally damaging and dangerous to worker health.
Vincent DeVito, counselor for energy policy at the US Department of Interior, said in a statement on Thursday:
"By proposing to open up nearly the entire OCS [Outer Continental Shelf] for potential oil and gas exploration, the United States can advance the goal of moving from aspiring for energy independence to attaining energy dominance."
Oceana, a non-profit conservation group, told the Washington Post that the plans were a "recipe for disaster".