My girlfriend and I are watching a movie at 12:30am. about 1o-clock the window lights up w/ headlights and I hear my truck start up. "Does that sound like my TRUCK?" "uhhh YEA!" "Hand me the gun! find the flashlight and call 911" I open the front door and i step off the porch and round a large pine i see my tail light lit up. "MOTHER-TRUCKER!!!" I see a shoulder covered by a dark green jacket peeking from the driver side, meaning that who ever was stealing my truck was still messing w/ the wiring. The shoulder and frame appear to belong to a small teenage male, i was really dreading the possibility of firing on a kid out for a joy ride. just like every time before the truck was broken into, Im thinking to myself "this is un-real". Ive witnessed someone trying to gain access to my truck and felt completely helpless, this time was different. I was armed, confident and un-afraid. I had the advantage of surprise and cover behind my sisters truck if needed. I run to the driveway w/ my 9mil pointed straight to where this guys chest will be when he pops up. I've got a steady aim on this persons, the alignment just feels right. All those practice sessions at the range paid off because the pistol naturally points at the threat and i am certain i will hit my mark. Im waiting for them to pop up and realize ive got them covered. One wrong move and they get 2 rounds full of holiday cheer. behind me I hear my GF slam the front door and run out w/ the cell phone and light. The truck door is slightly closed but not latched so i yell "GET OUT OF MY TRUCK YOU MOTHER-TRUCKER!" A head pops up and i see two palms pressed against the window. It takes forever for the beam from the flashlight to sweep from the concrete up the truck door and find its mark on the face. (everything was in slow motion) "Oh.....my......god" my girlfriend says, as soon as the face is lit up - - - - - - - - - my weapon drops to my side and i feel a huge wave of relief. In the driver seat is my sister; slouched posture, bloodshot eyes, and a drink spilled on her shirt. her hands are lazily held up and shes chucking while slurring "oops, you caught me Brotha-boy, dont shoot! " I had seen her drinking quite a bit earlier on. apparently she couldnt find her keys and decided to 'borrow' my truck at 1am. I think she passed out as soon as she got the truck started and thats why all i saw was a shoulder. I open the door and grab her by the neck of her shirt, yanking her out of the truck. as soon as her feet hit the ground she collapses. She couldnt even walk but was going to drive my truck. A few minutes later I was physically ill from the ordeal and could only speak in short word combos. "have to go" "can stop" "gonna throw-up" I had to go for a run @ 1am cause i had a massive adrenaline dump that suddenly had no reason to be in my system, i was shaking like crazy, and vomited twice, but i sprinted an entire mile in flip flops im so thankfull that ive logged a ton of hours at the range and ive taken the class and ive read/thought about dealing w/ threats. I stayed calm, kept my finger off the trigger until i identified the target, i also realized that the neighbors van was about 20' away w/ no other targets behind it. I could totally imagine a 'cowboy' running out and opening fire on the shoulder w/ out waiting to identify the target. Though I live in an small upscale area recently there's been a wave of burglaries and auto theft, 39 incidents within a few months. My neighbors have been hit twice and alot of people i know in the area have as well. My sis is in alot of trouble w/ me at the moment and she's promised to give up drinking for a good while. Im glad i stopped her because driving in her condition would have been extremely dangerous. However, Im having a harder time getting over the fact that I pointed a live weapon at my sister and i was inches away from doing some serious damage. I dont know how i would have lived w/ myself if things had turned out for the worst. Im not in the mood for monday morning quarterbacking, Im extremely distraught over what happened. That is how i would react to someone stealing my truck each and every time and its perfectly legal in texas to use lethal force. Hopefully the lesson to be learned here is that threats can be friendlys and a positive ID is a must.