Me when they have any old computer or gaming tech in anything set in the 1970s or 80s.

"That's a Vic20 but IT'S NOT PLUGGED IN, look, you can see the power port on the right side."

"That's a ZX Spectrum but they're showing ORANGE on the TV, the Speccy doesn't have an orange!"

"They're playing Defender but THOSE AREN'T DEFENDER SOUND EFFECTS."

"Those kids are supposed to be in a mid-1980s arcade but that cabinet CLEARLY has a flat LCD panel inside it." #StrangerThings

"Why is that person poking the Gameboy with their index finger?"