Rabbits have very good hearing and smell. Something alarmed your rabbit. Once I was in our bedroom and Bunny as setting on the floor. Suddenly she started thumping. I didn’t hear anything or notice anything I looked out the bedroom window. There was a large dog outside! Very unusual because dogs must be on leashes. The window is slightly open so Bunny must have smelled it.
Occasionally, there would be a thump at night. Once again she must have noticed something.
But some of her thumping were not false alarms. Once on a Sunday late morning, I smelled a slight hint of smoke and then my wife also. We talked about it and I said it was probably the neighbors burning something in their fireplace. Then Bunny started thumping vigorously. I got up and walked around and walked outside. Our trash can was on fire and it was sitting under wooden eves of our house. It could have caught the house on fire. The culprit was my wife’s then unruly grandson. He had thrown a cigarette butt in the trashcan.
Another night….thump, thump, thump. I got our of bed. I didn’t hear anything. But Bunny could hear a rat struggling in a glue rat trap on the other side of the house. (I took Mr/Mrs rat to the city part and released it). To release a mouse or rat from a glue trap, pour a little vegetable oil on their feet….they release immediately and when they lick the oil off their fur, the vegetable oil will not harm them.
I think it’s a good idea to share your bedroom with a rabbit. If anything unusual is happening, they will start thumping. Probably just as good as a dog, but a bunny will not attack an intruder of course. .