I knew the cave was full of rabid bats, but I'm going to keep it to myself when my brother wants to explore there.
Thats evil. Why wouldn't you warn him of these dangerous animals?
I knew he would get hurt when he's in there, I'm doing this to him because I don't like him that much anymore. I know he is not that smart.
You need to tell him and not hide it from him. He can really get hurt or get rabies. You need to treat family better.
I'm going to wait until he's attacked and then call 911.
It might be too late if he gets infected by rabies before then. Rabies is a very painful condition that can end up killing your brother. It's evil to allow him to unknowingly walk into such danger.