You have to pick:

I am unlikely to succeed at walking a tightrope across Niagra falls

This would be so much fun.

Saddly humans are the domiant species on this planet. So there isn't much that would prove difficult to kill with a bullet or too.

More importantly, what if your profession is killing monsters?

i think that monsters would start spawning, and bullets would do damage based on level and quality. if your profession is killing monsters then you win the game.

for a seacond i thought niagra was narnia