I had a friend who during university years was collecting these (all)kind of tapes. Building sites, crime scenes, whatever. Once he did it in Serbia as well (early nineties) and we almost got busted. An old couple came out from a neighboring house and started screaming -of course we did not understand anything of it

and then a cop appeared at the far end of the street. So we ran away

but he was still dragging the 8-10 meter long red tape after him
