is this normal?

so, my 37 yr old brother got drunk asf last night and grabbed a baseball bat and told my mom “get ready” and he stormed out the house, put the baseball bat in his car and left. i dont know wtf he was gonna do .then he came back and passed out on the couch. and he was saying the goverment is on top of our roof and they are gonna use him for a science experiment. Is that normal behavior for someone that had 6-12 99 shots? or is it drugs?