IF: Double

It's very rare but it's been known to happen, you select a yummy treat from a vending machine and two fall out!  So you end up with a double treat!! 

What's more likely to happen is once you've made your selection, your treat teases you as it dangles forward and gets stuck.  That's normally what happens to me, but Nutkins has had more luck, he's got two choc and nut bars to enjoy.