Gomer Pylot:
I'll bet you got really, really busy really, really quickly. For all the good it did you, huh?
Who, me? Really, really busy? Nope. If you know how your ship starts, and if it's been starting consistently, then there is nothing to it. In a 206B, I merely open the throttle to...wherever. The engine lights off normally. As the start progresses, I just make sure that the throttle is back to the stop. No drama at all.
As far as releasing the starter button early...I know that the book says to hold the starter to 58%, but I also know from experimentation that a C-20B is self-sustaining from about 45% N1 up (depending). Releasing the button early (like between 20 and 30%) is not disastrous, and the TOT does not spike upward like a fuel control gone bad (although you do have to be quick to get the button back down). That compressor puts out quite a lot of cooling air. In fact, a C-30 compressor is so powerful that if you wait until too high an N1 to introduce fuel you might not even get it to light off.
Pilots do get anxious during a turbine start. But if you have your procedures down pat and you don't have your head up your arse, it's really no big deal. (On the other hand, if student starts a no-flywheel piston-engine ship like an Enstrom with the throttle open a little too much...
watch out!)