In April 2011, shortly after Sharav and I left Tel Aviv and when we were staying with my parents in Maryland, he breathed in some kind of nasal irritant at the park, probably pollen or maybe even a small leaf, and started hysterically sneezing, and the sneezes were so rapid and so severe that I did consider taking him to a veterinarian.
Instead, I actually asked on my facebook wall what to do, because apparently that was a thing that we did in 2011, and then eventually the sneezing just wound down and stopped, and it never happened again.