You might have suddenly inhaled a concentrated cloud of an irritant, allergen etc. Caught by nose/nasal cavity, so sneezing instead of coughing until you got it out.
Random, unrelated question- were you or had you just finished drinking coffee or something?
it was right after dinner. I had water to drink? It's Lupus?
Lightweight. I've sneezed at least 20 times in a row before. At least.
