Not only is this on Wikipedia, but now it was confirmed by Mythbusters. Q.E.D.: that makes it double true.
- Defuses a highly advanced nuclear warhead using a paper clip to short circuit the timing device.
- When near a deadly laser grid, MacGyver lights a pack of cigarettes to make the lasers visible. He then smashes a pair of binoculars, removing a prism to deflect a laser beam back to the emitter, destroying it.
- MacGyver plugs a sulfuric acid leak with chocolate. He states that chocolate contains lactose and sucrose (chemically C12H22O11), which are disaccharides. The acid reacts with the sugars to form elemental carbon and a thick gummy residue. (This has been tested and confirmed by Mythbusters).
(From kottke and gongblog), and Google image search.