If you ride something like a Ducati single where the exhaust pipe is held into the head by a threaded collar which periodically works itself loose, when you start the bike and notice that the downpipe is rattling and the exhaust is blowing, do not stop after you've covered 100 yards or so, grab hold of the downpipe with one (bare) hand to push it into place while screwing the collar in with the other (bare) hand. The handprint burnt into the downpipe will not polish off no matter how hard you try and the smell every time you stop at traffic lights reminds you of pork crackling. However, you could commit all sorts of crime for the next month with little chance of being caught as you have no fingerprints........
Guess who once owned a Ducati single........