A limited edition hot-sauce made of pure capsaicin is described as the "hottest science can make, "like having your tongue hit with a hammer."
The sauce is 30 times hotter than the spiciest pepper and 8,000 times more fiery than Tabasco.
Diners must sign a disclaimer recommending "protective gloves and eye wear" – but even sweating testers in safety gear were blinded by tears for 30 minutes.