Unfathomable Questions

Why is it that three times in the last two years I have had a baby spider drop down in front of my face while I am at work? How many baby spiders have to drop down throughout our four suites of offices in order to statistically allow for it to happen three times in front of my face within a one foot square of space? I can't even calculate the odds or numbers. Or is there simply a portal into our world for baby spiders located above my desk?