Restricted areas that didnt have metal detectors that is.
Also this monk had to do all that chi channeling stuff for about 3 mins before chucking the first needle- i would have torn him a new one before he turned me into a dartboard

It is an impressive, but useless skill. However, the speed, focus and power necessary to succeed, i suspect can be used in more practical ways.
Don't let the door hit ya' where the good lord split ya'