- A USB port does not deliver the kind of power necessary for this to happen
- A mouse doesn't have the kind of circuitry inside for a power surge to cause it to go up in flames like that
- even if it did, and even if all that weren't the case, the burn pattern is entirely inconsistent with what you would theoretically see:
- The front of the mouse, where power is delivered, is the least damaged area of the top of the mouse
- The bottom of the mouse is largely intact, with the most damage being at the rear; the circuit board and sensor are located center front. These are the areas power is actually routed through, and would be the most damaged if this happened as described.
- Instead, the areas actually damaged are the rear bottom and rear and central top shell, which are generally just plastic. The only parts with even slight power going through them would be the sensors for the mouse wheel and buttons, which are significantly less damaged than the unpowered plastic shell.
Even if you spliced the USB cable's power lines directly into an arc welder's leads, you would never see this happen - neither the wires in the USB cable nor the circuit board could handle the kind of power that would result in this kind of event, and would simply critically fail. Either the wire insulation would melt and cause a short circuit, resulting in the port's power being cut off, or, more likely, the traces on the circuit board would burn out instantaneously at the point of highest resistance, resulting in the circuit being cut and no more power being delivered. Either way, at most, you'd get a little bit of smoke for an instant, and a broken mouse.
Again, none of this would be possible given the power limitations and basic safeguards on a PC USB port, even if the mouse was somehow modified to send out an incorrect device class identifier, so it's all just an impossible what-if scenario to begin with. Even absolute worst case, you would still only end up with a dead USB port, not a fiery mouse of doom.
As far as I can tell, the mouse looks like someone decided to have some fun with a heat gun, although given the appearance of the desk, they might have instead used a propane torch at a distance on the mouse before directly hitting the desktop to make it even more painfully obvious this was staged.
Goal? Get some attention on Reddit, while making those who raced to make an article out of it without so much as a cursory examination or a moment's consideration feel
really dumb.
I get the sense they succeeded.