And I feel hardcore when I drink espresso:

The Wehrmacht, Germany's World War II army, ended up distributing millions of the Pervitin tablets to soldiers on the front (they called it "Panzerschokolade," or "tank chocolate"). The air force gave the tablets to its flyers (in this case, it was "pilot's chocolate" or "pilot's salt"). Hitler himself was given intravenous injections of methamphetamine by his personal physician, Theodor Morell. The pill, however, was the more common form of the drug. All told, between April and July of 1940, more than 35 million three-milligram doses of Pervitin were manufactured for the German army and air force.

News of meth's powers, unsurprisingly, spread. British papers began reporting on German soldiers' use of a "miracle pill." Soon, Allied bomber pilots were experimenting with the drug. Their tests ended quickly, though; while the soldiers who used pilot's salt were able to focus on their flying in the short term ... they also became agitated, aggressive, and impaired in their judgment over the long.