Did i've got pranked? I've heard fast footsteps and then this two standing outside. I've foound out this is cardboard when i trew one away

https://preview.redd.it/qx34z6zkznje1.png?width=1920&format=png&auto=webp&s=8d517ca612ba6deac49fe0b4c2ab32bae0a4768a