Whammo

So, I'm driving along when, whammo, a tree falls in front of the car.

Source: wiktionary

"Sure, the boys say, 'What's the use? I'd just get started and whammo, I'm gone.'"

Source: wiktionary

Every year I try to catch the first buds as they break out of their winter closets, and every year I miss. One day you hit the street on your way to your day's routine and there it is, whammo, LIFE, popping up and out all over the place.

Source: wiktionary

He lifted one foot and set it down again, whammo, but Ed was so engrossed in Pynchon's novel that all he recalls is tromping the scorpion to death with his stung foot, then quickly fetching a bucket of ice water, jamming the foot into it, and continuing to read.

Source: wiktionary