The amigos have the SF factor down to a science. We even have a formal society; ROOSF. "Royal Order Of Stupid Fucks."
There are two kinds of SF situations. Ones that you intentionally create, such as deciding to ride a bike on a lake at night when the wind chill is -35 degrees. And then there are the happenstance kind; where you make a decision or forget to do something and you create your own "SF moment". An example of the former is wearing your big old boots and not tying the laces, letting them dangle on the ground, tripping on them and breaking a rib as a result of not tying your fucking shoes.
An example of the latter, a forgetful SF moment, I experienced this week. This past Wednesday was balmy by recent standards, 25 degrees. I decided to fire up the gas grill and cook some chicken. My grill has 3 burners, and I turned on 2 of them. The chicken cooked up just fine and a good time was had by all. Two days later, I'm letting Charlie out and I notice the grill's thermometer was reading 125 degrees. WTF, I said to myself. I then looked at the burner controls and sure enough, I left one of them on. For 48 hours. It was on low, but, still. SF!