This guy must really like sour flavors. David Rush, who has broken more than 100 Guinness records to promote STEM education, drank a liter of lemon juice in under 17 seconds for a Guinness World Record. He completed the feat in 16.53 seconds, beating the previous record of 17.12 seconds. Rush said he managed to keep the liquid down, but has stomach discomfort until the next day.