"Shop"lifting

[bEdhEd]

I've left safety glasses on my head and I have kept tools and camera lens covers in my pockets. There are days when I forget that they're there and I take them home with me, and have to return them the next day. Probably the most expensive thing I accidentally took home from the shop was a camera lens cover, since it costs more to replace than the cost of other little tools I've taken. There are students who take home some stuff from our shop on accident, too, and I'm sure other FRC team members have had the same experience. I don't think I've never taken home anything worth more than $50, though. So that led me to wonder:

What's the most expensive thing you've accidentally taken home from your shop?