Came out of the toolbox 

A term used to describe someone who joined, switched into, or revealed that they were/are an Engineer after claiming otherwise for a long time. This is actually very common for students who originally wanted to do Engineering, but left it for something else because they thought it would end up boring, or because of annoying parents. In some rare cases, an art student will come out of the toolbox, and if they are successful they will be hated by everyone for being both left and right-brained.

Some warning signs could be: Tinkering when no one is around, playing with Legos too much, and casually building the Iron Man armor in the garage.

"Hey, did you hear Tony came out of the toolbox?"
"Pshh, doesn't surprise me. Animation was just a cover-up, I knew ever since I saw him 3D printing in the library"

Came out of the toolbox by whispy82 February 2, 2015