This is why you always bring a coffee to presentations/meetings. Even if caffeine is not strong enough to stop you from falling asleep the activity of picking up a cup and taking a sip every few minutes will do.
I didn't get hooked on coffee until I started at Boeing. There's nothing like Boeing MIL-STD coffee. It was years before I realized that my Sunday morning headaches were caffeine withdrawal (I'm really not very smart).
I still like my coffee black and tasting like industrial waste.
