Today, I Am Lanthanum.

Lanthanum is a soft, (well I could use a few hours in the gym) ductile, (yes, I do get bent out of shape under extreme stress) and malleable (not so much, no) silvery-white metal, that burns easily when ignited, (no, you don't want to see that) and is used in the manufacture of expensive camera lenses because it gives glass refractive properties (funny, that's my job too: helping others focus).

Source, A Belated Happy Birthday to You, Oliver!