Tested with pixie sticks? Some people jump off a bridge and survive also..
nah bro I used that voodoo magic I learned while working for an HVAC company... god some people... bless your heart.
If he's got any charge at all he's gonna be absolutely fine jumping that switch for a minute to verify the compressor is operating correctly. It's the oil starvation that will kill a compressor. Those little gauges you get from auto parts stores are basically worthless and I wouldn't trust one for a second.
I'm no expert but I knew better than to run to the repair shop just because my AC blows hot air.