How do you make it rain?

Plan a trip to the zoo. It's either that or go to the zoo on their discount admission day... Some of Kevin's employees got together and got us a gift certificate for zoo membership for a year. I thought it was incredible and generous and amazing that they did, so yesterday we were going. Little did I know it was $5.00 day meaning everybody was at the zoo. My husband hates crowds. I could see the look in his eye when he saw the full parking lot. But he was a trooper and drove to overflow parking. We finally get into the zoo and of course it was crowded, a madhouse really. We did get to spend 30 minutes before it started to rain, and since we can go back whenever we want to it was no big deal... But the really amusing thing is that once before, months ago I decided we should go to the zoo on $5.00 day just to check it out and we drove down, and the crowds were double what they were yesterday and we debated what to do and that moment it started to rain... so is it us or the discounted admission that makes it rain? Maybe we'll find out next time we take a trip to the zoo.