
Dave's Hot Chicken, a popular American fast-food chain, opened in the UK this weekend and requires customers to sign a waiver to try its famously spicy 'Reaper' burger. The burger, made from Carolina Reaper peppers, averages 1,800,000 Scoville heat units, making it up to 650 times hotter than Tabasco sauce and 300 times hotter than a jalapeño.