From the Huffington Post:

"In this viral video, a service dog named Wiley appears to cry at the grave of his handler's grandmother."

My wolf-dog, Wiley, crying at my grandmother's graveside at the cemetery 04/14/13 To add some clarification: I am not a vet so I can't say if he's reverse sneezing as some of you are stating. I can tell you that he has never done that before and hasn't done it since.