I remember my first real knife, I had a few imitation SAKs before this but I don't count them. I was maybe 10 at the time, had just moved from Cub Scouts to Boy Scouts, and my parents took me to REI to buy a multi tool.
I looked at a few and settled on the Gerber, I really like the way you could flip the pliers out single handed. I was feeling the blade for sharpness and managed to slice my finger open in the store and started bleeding on the display case. Like I said, I was 10 and had no idea what I was doing. The clerk kind of luaghed and jokingly said, "well you bled on it, guess you have to buy it." I had already selected it as my favorite, so that worked out ok.
Later, when I got home, I started to practice flipping the pliers out. Next thing I knew the tool slipped out of my hand and embedded itself into my closet door. I still have the tool, and it's still one of my favorites. However, lately it has spent more time on my book shelf than anything due to it's sentimental value.