Tip your waitress

Yesterday I went to Kohl's, I noticed a lot of people waiting to pay for their purchases.  As I walked towards the shopping carts, one of the Kohl's associates was also walking to that area.  We both stopped to allow passage, the associate said, 'Do you need a cart?'  I said, 'Yes, please.' She pulled out two carts and said, 'Would you like this one, or this one?', pushing them both forward.  One was a standard type cart, the other had a baby seat in the front.  (I'm not sure if I just happened to have everyones attention or if I was talking too loudly)  Jokingly, I said, 'Well, since I left the baby in the car, I'll take the regular one.'  The next thing I knew everyone in the immediate area was laughing their heads off.  The associate was doubled over the cart laughing hysterically.  Still laughing, the associate gave me the cart and said, 'Did you crack the windows?'  I looked at her with a very serious face and said, 'DUH!' The shoppers continued giggling, the associate kept laughing and said, 'And you glued a bottle to its hand, so it's no problem.'  I smiled and nodded.  As I turned to walk away, I stopped, turned back to the giggling associate and smiling shoppers.  Maintaining a straight face, I asked 'Babies like Gin right?' That last comment was all it took to send all of them back into hysterics.  Right before I walked away, I said, 'Tip your waitress!' 
You never know what private battles people are dealing with. Any one of those people could have been having a horrible day or past few days, and that may have been their only laugh. 
Feeling triumphant, I walked away with a smile.