--I suppose giving one 12v to simulate hooking up a
power supply wrong?
--Hooking 12v to a device normally powered at 5v?
--Shorting out a buffer output? (I think some
buffers are designed
to be shorted out though)
--Vehicle ignition coil to an input? : D
Reverse ground and +5v
Clock an input way too fast
Heat it up far too much (soldering iron/heat gun)
Microwave oven.
Shufffle....shuffle...shuffle..shuffle....ZAP!
Or, of course, to make things appear dead or damaged,
all you need to do is manually short an input or
output to ground with a wire.
Some chips are suprisingly resiliant. I once tried to
kill a mask PROM on purpose using static electricity.
It took at least three or four good zaps to kill it.
-Ian