Too much coffee.
And maybe some glue?
Right on the coffee but WRONG on the glue. Many years ago a friend of mine thought it would be cool to sniff glue. He squirted glue into a paper bag and took deep breaths from it over and over again to get high. Not too much later he was crumpled up in agony claiming that it felt like the glue vapor resolidified inside his lungs and was suffocating him. He eventually hospitalized. Lucky for him he survived but swore off glue forever which also had me thankful that I never tried nor ever would sniff glue (although I sort of cheated by getting a bit of a buzz making plastic model planes and boats).