Eric Sink has a good example
of a seemingly small addition to a piece of software having a bigger than anticipated impact. His important rule concerning this is, “Everything looks easier than it really is.” I prefer this sniglet:
Dopeler Effect - (n) The tendency of stupid ideas to seem smarter when they come at you rapidly.
(If any reader knows where I can attribute this sniglet to, I'd appreciate it).
Or to quote The Princess Bride:
Don't rush me, sonny. You rush a miracle man you get rotten miracles.