Vending machine mojo [updated]

I just went to get a drink from one of the vend­ing machines here in the library. My tithe, a whole dol­lar, con­sisted of three quar­ters, a dime, and three nick­els. I drop in my money, I stoop down to make my selec­tion, and hor­rors, my Trop­i­cana pink lemon­ade but­ton has been replaced by some cola crap!

Refus­ing to panic, I look to the vend­ing machine imme­di­ately to my right, and lo, there is a whole machine ded­i­cated to water and “juices.” (My Trop­i­cana pink lemon­ade con­tains 3% juice.)

So I hit the coin return but­ton. And I get a dol­lar in quar­ters. Huh.

I move right, and put my new quar­ters into the sec­ond machine, punch up my drink, and tha-bump-bump, I get a lovely flourescent-pink Trop­i­cana pink lemon­ade, AND a 20 oz. Aqua­fina bot­tled water!

Whoa.

I’d like to try it again, but I’m out of nickels.

Update three days later: I tried again, with the exact same change, the exact same process (yes, I even put it in the wrong machine and got my four quar­ters in return) but no dice. I only got one drink.