According to an erudite commenter over at Obnoxio's place, a trillion is $5 for every star in the galaxy. Personally, I think governments should be constitutionally obliged to describe all expenditures in TWL's (taxpayer working lives). Until then, Pagetutor.com has gone to the trouble of showing what some of the large numbers being thrown around carelessly by our "leaders" actually look like. Click on the heading to take a look. Meanwhile, here's what a trillion dollars in $100 bills looks like. Click on the picture to enlarge (the little red dot bottom left is an adult male).
Impressive, isn't it?