Doo-dee-doo

Doo-dee-doo

Just doin' my 2.003

Doo-dee-doo

Rollin' a spool

Doo-dee-doo

Slidin' a bar

Doo-dee-doo

Watching a motor compress some weird arrangement of two-force members, pushing a piston-type thing against a spring

Doo-dee-*gagh!*