"The question is not whether these boards will catch fire or not. The question is when they will".
(Said by Fermilab electronics experts who were members of a review panel that provided advice on the construction of a prototype of fast-tracker hardware boards that had been designed for CDF for Run I. The boards were meant to process online data from the CDF tracker at trigger level 2. The boards were redesigned and eventually worked very reliably (no fires!)).