A knife fight in a bar. A lame injury is always explained as a knife fight in a bar. Sheesh, don’t you people know anything?
Tell 'em it was Killer Rabbits.
Or that that sisters at Castle Anthrax are into S&M now.
When I first met a friend of mine (I think he’s Chinese… oriental, anyhow…) he had these big scars down the inside of both arms. My other friend (who knew him), asked him how he got them, as they were recent. He claimed they were ritual scars from a ceremony involving a knife. My friend and I were nearly sold for quite a while. “No. Really??? I don’t believe you. Really???” Turned out he had low bone calcium, took a bad fall at a martial arts class, and ended up with two broken arms. 
I always thought that was cool enough, but perhaps he didn’t like the falling down bit. Or he just liked yanking our chains. So there ya go: you recieved your injuries at a ceremony, the logistics and membership about which you will be suspiciously vague. 
I did ride a motorcycle into a barbed wire fence. I rode to a friends house up the street. A few hours later I came home and decided to ride the motorcycle into the back field. No one told me while I was gone that my Mom and stepdad bought my sister a horse and my stepdad, being the lazy type, strung up a barbed wire fence between the neighbors pasture and the garage. I was doing about 30 mph when I noticed the new fence. I locked up the brakes but I was on grass as slid into the barbed wire. I ended up with a couple of cuts (one right next to my right eye) and about 20 puncture wounds.
You shoulda seen the other guy…
The full story to tell to male friends:
So there I was, sitting in the grass of my front yard next to this really hot girl I had just met. We were fooling around a little bit when we heard a scream. We looked up to see a 3 year old chasing his ball into the street. His mom was screaming to try and stop him because a car was coming and she was too far away to do anything else. I jumped up, ran towards the still oblivious kid, dove and pulled him out of the way just as the car saw him and tried to stop. I got him out of the way just in time as the car would have hit him, but in the roll at the end of the dive I ended up with these cuts from the gravel.
The mom was crying and thanking me, the kid was just crying, and the hot girl was worried about my wounds. We went back into my house where she helped stitch me up at which point she decided to reward me for my bravery.
The full story to tell to female friends:
So there I was, sitting on my driveway while composing a song on the guitar. I looked up to see a 3 year old chasing his ball into the street. His mom was screaming to try and stop him because a car was coming and she was too far away to do anything else. I jumped up, ran towards the still oblivious kid, dove and pulled him out of the way just as the car saw him and tried to stop. I got him out of the way just in time as the car would have hit him, but in the roll at the end of the dive I ended up with these cuts from the gravel.
The mom was crying and thanking me, the kid was just crying. I had to go to the hospital for stitches. I won’t be able to write and play songs until I heal but it was worth it to know that little Timmy has a second chance at life.