A genius realises he doesn't know everything. But the fun answer is that genius has limits.
Do you enjoy watching your pets' amazement at natural occurrences? (One of my cats is currently looking at snow gust through our street in pure fascination and it's so very cute)
There may have been one time that I didn't, when the service was really abysmal, but I'm not even sure I skipped it that time, may have just tipped a lot less.