Is my bunny seeing something that I don’t?

his name is Bruno and I speak in Polish

It happened yesterday, I was home alone just cross stitching sitting on the couch and watching Tv. My bunny Bruno was acting fine, I was petting him, he sometimes just hopped around the room (his cage is in this room and I got him in May 2025, so he knows the room) and then he started acting weird. He just stood there and thumped looking at nothing (?). As you can see on the video I walked up to him and then he looked around the room weirdly like he was watching something and thumped… Yes the floor is creaking A LOT but he is used to it, this is the only room that he roams around, he never went outside even tho he is free roaming most of the time and we don’t have the door in this room.