The most challenging thing is surgery.
I always found the most challenging thing in photography was the next think I was going to photograph. What I had done was in the past and behind me, the future was always a challenge.
the most challenging thing is getting everything right! you get one thing but then another just slips away.
the most challenging thing i had expereinced in my life was when i got drunk it was not that easy because i wasa not prepared.
well it depends what type of nurse, a doctor nurse or hospital nurse, i think a hospital nurse would be hard to let 'people go' when they die, you see their family cry and stuff...
probably the babies dying would be the hardest part of that paticular job
A senior consultant
the most interesting thing about being a doctor is that you can help people
Paper writing.
If you have your own practice, the most challenging thing would probably be dealing with the insurance companies because in today's world you will have to really jump on insurance companies when trying to get their payments. If you don't have your own practice, it would probably be very worried parents. :)
Leaving my boss breathing.
Your patients try your patience. I would say death, no one can get used to that.
The most challenging trail at Whistler Blackcomb is the Couloir Extreme. Another famously challenging trail is the Big Bang. The most challenging trails are these two.