Oil prices briefly dropped below zero in the pandemic due to storage overflow

Evidence

To give another example, during the pandemic, for a day or so, the price of oil also dropped below zero. It was strange but understandable: because most of us were locked down, demand for petrol and diesel oil buckled. Suddenly oil reservoirs overflowed and their owners, who had long-term obligations to buy certain quantities of oil every week independently of demand for oil, were forced to pay people to take that excess oil away. — Yanis Varoufakis, Technofeudalism, 933

Categorization

• CANDY: A surprising, easily-retold fact perfect for conversation: commodity prices genuinely went negative once, i.e. people were paid to take oil.
• corroborated: 2 independent passages support this claim — Yanis Varoufakis, Technofeudalism: What Killed Capitalism, 933