Here he is, decked out like Gordon Gekko, puffing on a cigar he lit with... a $1 bill. Which, according to Title 18, Section 333 of the United States Code, can garner up to six months in jail.

Here's the section in full:

"Whoever mutilates, cuts, defaces, disfigures, or perforates, or unites or cements together, or does any other thing to any bank bill, draft, note, or other evidence of debt issued by any national banking association, or Federal Reserve bank, or the Federal Reserve System, with intent to render such bank bill, draft, note, or other evidence of debt unfit to be reissued, shall be fined under this title or imprisoned not more than six months, or both."

It is apparently enforced by the Secret Service.