On my old 2000 LGT I had a remote starter. One night I must've left it in reverse after I backed into my old condo's garage. Started it the next morning and it backed right into my workbench and pushed the back wall of the garage off the foundation. I tried in vain to fix it myself but eventually had to go fess up to the building manager.
On my Altima before that, I lifted the hood too high and the back corners hit and cracked the windshield.
Not much so far on my wagon, probably the most embarassing things so far are that I missed a couple things on my pre-purchase inspection - Invidia UP and aftermarket grill...