trigger(an event or thing that causes something to happen: the trigger for the strike was the closure of a mine. NOED Alexander Demidov); experience(Recently, my wife and I had a very unexpected experience at our local Sears store. – необычное происшествиеART Vancouver)
goings-on(Shortly after his arrival, Frank joined Ken and Debbie in the kitchen to discuss the bizarre goings-on further. They returned to the study a short time later, and to their shock, a new message was awaiting them on the computer. (mysteriousuniverse.org)ART Vancouver)
