In college, had a lab partner accidentally break a PCB. (He dropped his pack, forgetting it was in the front pocket- crunch.) No time to replace it it, so taped the two parts together as I could from the sides, stripped some wire from the spool in my pack. Licked a gummy bear, rubbed the bits of wire on it so they would be a little sticky so that they wouldn't run away for a minutes or two, put them on the traces. Wrapped the entire thing in electricians tape.

It worked long enough for us to show the prof. Then the professor picked it. Didn't work any more.