I found this on FB the other day, and thought that (pretty much) every member of this forum has experienced at least one (if not several) of these "laws".
Please feel free to share this with others.
1) No sooner have you closed a section, then a LED burns out or connection breaks
2) You proudly show off you model and it starts to smoke alarmingly
3) The holes you make in the support structure top allow wiring weaken the entire thing
4) You don't realise that the resistor on your test lead (to protect the LEDs) has fallen off and you burn out a crap load of LEDs
5) You will drop hot solder on bare skin when soldering a delicate connection