My heart appears to be beating uncontrollably fast. It's rather unsettling. I /know/ this has something to do with the interaction between grapefruit juice and caffeine...
(insert pause for research)
Apparently, the naringin in grapefruit juice inhibits the enzyme that destroys caffeine and prolongs the time of caffeine influence by 30%. Huh. h. h. h. TRAVELING THROUGH TIME AT GREAT SPEED!&!@&*@!&*