I have come to a conclusion that running nose/iesnas/nohu is like earthquake:
-it can never be predicted when it arrives, but it does from time to time;
-it can not be stopped in any way and one should just sit and wait until it decides to stop;
-there can be also second and third wave of that thing.
Just like for earthquakes, magnitude of running nose can be measured so that others can understand how severe it is. Measurement scale should be number of paper napkin packages used per day. 1-3 is often felt, without significant damage; 4-5 felt widely, damage near epicentre, i.e. nose; 6-8 seriously running nose, major damage, can be deadly; 9 – very rear enormously running nose, major damage over large area. Starting from 6 can be also measured in other scale: rolls of toilet paper.
I have currently scale 2.47.

Only in case of running nose there is no sense to crawl under a table unless, of course, your colleagues and friends are tired of your loud nose blowing (because it’s impossible to do it silently, and it’s too tiresome to go to bathroom every time) and sneezing and start to throw different subjects to your direction.