crazily busy

I can't imagine how tiring and exhausting Adrian's job is. He spent most of his time working and working and working. He even works a whole day on Saturday. His phone keeps ringing at midnight for dealing with abrupt system problems. So he wakes up at 2 or 3 or 4, talks and explains on the phone, and then turns on the computer and types and types. After that, he calls back and then explains in such a computer language that normal people don't understand. I never know when he returns to sleep coz by the time he finally solves all problems, I have always fallen asleep. He is so exhausted that I feel bad and worried. This project tortures him (perhaps so does his company!). The best moment of the day is looking at him sleeping peacefully. By the way, he has the cutest tummy.