Walking down the hall, the mechanic brings you into the cafeteria, saying "The pop machine's kinda jammed." After zoning in and out as he tells you this story of a vengeful pop deliverer (you know the story's pretty far-fetched), he gets to the point and lets you know that the buttons don't work correctly and the pops are jammed (machine is overfilled). His idea is to order the same pop three times so that they come out instead of being jammed in.
The pop machine's free, so try as many times as you like. Keep refreshing the page until you get three of the same pop, then take the reward that appears. Only take the reward once. note: the mechanic has been eyeing that Budwieiser button for a while. If you happen to make that come out. I'm sure he'll give you little extra.