If you fire a variable-output-setting ray gun at a normal human,

>>54088601
it gives them cancer and they die 10-20 years later

>>54088601
THAT DEPENDS ON WHAT SETTNG THE VARIABLE OUTPUT RAYGUN IS ON YOU DONUT

>>54088601
watts: tingling sensation
kilowatts: set on fire
megawatts: vaporized
gigawatts: the city block is blown up

>>54088767
This probably. The last setting would probably melt the weapon and give the user radiation poisoning.

I actually had an item like this in a pulp sci-fi fantasy game I played once. Every time you fired it you'd roll on a slow-burn logarithmic table aiming for high or low power. If you rolled to well it would destroy everything and probably wipe half the party.