When someone steps on your freshly groomed and smoothed ski or snowboard drop-in run and makes a huge imprint which looks like the notorious shot of Neil Armstrong's footprint on the moon. The similarities are uncanny!
You have just finished smoothing out the drop-in line for snowboarding a handrail and then your buddy walks straight across the freshly smoothed run-in, making a huge impression of his boot smack in the middle of the run-in. At that point you shout "you just Neil Armstronged the drop in line bro!"
by Fringe Lab February 19, 2014