Power Coma
When you intend to take a 20 minute power nap and you wake up 2 hours later.
I was so tired after work today I just wanted to rest my eyes for a few minutes. The next thing I know, I wake up two hours later and discover that my power nap has turned into a power coma.
Power Point Coma
Brain has gone into deep sleep or faraway places during a lengthy PP presentation.
Dude, did you like my speech on dinosaurs?" "Sorry, man, after 58 slides I fell into a Power Point Coma.