An off-duty police officer.
I take that with me sometimes!
Here's whats in my car:
Mighty Giant Ladder (gets really tall, but folds to fit in my bug)
Toolkit from Ikea (love it)
5-6 locksets
Zip ties
Baby wipes
"Wellies" rain boots for mud/snow or ick
Change of clothes
box cutter
electric drill w/metal & doorknob drill thingies
bump keys
"No Trespassing" signs
"Caution" tape
a zillion nails & screws
packing tape for taping CFK & other notices to doors
trash bags
box of clearance air fresheners from Wal-Mart (nice for stinky listings)
light bulbs
taser
pruning shears for those rosebushes that try to grab you when you walk by
"Ginsu" scissors
A zillion pens
sign panels (because they keep dissapearing)