Why is it

Okay so have you every noticed that no matter what is going on during your day. That zilch will be happening...No body will come into the particualr business you are working at..the phone will not ring and you can barely keep your eyes open from total boredom, but the minute you hop into the restroom and get your pants around your ankles, suddenly the door chime is going off multiple times, the phone starts ringing and people are standing at the front yelling "Hello is anyone here"
Don't you just want to yell back..WTF couldn't you come in 5 minutes ago..but NOOOO you have to wait until I'm at a point of no return.
So this seems to be one of those points to ponder in the great adventure mystery that we choose to call Life.
Any thoughts????