Your co-worker in the next cubicle had burritos for lunch and they didn't quite agree with him.
As they say, this is a good place for a stick-up but unfortunately, you don't have one. Nor do you have one of those Glade plug-in air fresheners.
But luckily you do have your scented USB drive and can plug that in, at least till your co-worker's digestive track stops spazzing. And while it might be better if it were pina colada scented, anything is better than smelling Bob's burritos.