[tomxor]

>> the sales guy yelled at me; "WHAT DID YOU DO?!?!?"

> At this point OP could have explained what they did [...]

The sales guy could also have been less accusative and instead embrace their curiosity as a customer... It was an opportunity to invite the onlookers who were already interested in what the author had coaxed the display into doing to learn more about the machine.

I can imagine a younger version of myself also reacting a bit negatively to such an exclamation after having a harmless investigation of a machine. Unfortunately it tends to be the reaction of ignorant and uninquisitive people.

[relix]

Or it's a natural immediate reaction of a normal person in distress who wasn't prepared for an outsider to come sabotage their presentation and made them look incompetent in front of an audience while they're already stressed out.

Leave it up to engineers to expect everyone (else) to be the paragon of virtue rational homo sapiens sapiens with all the wisdom and maturity.

[tomxor]

> Leave it up to engineers to expect everyone (else) to be the paragon of virtue rational homo sapiens sapiens with all the wisdom and maturity.

So i guess we are in agreement :D The sales person was neither wise or rational. They were acting on the emotion of a singular thought, selling shit.