get him to a doctor & good luck. My mum has had some of these symptoms, she had a massive stroke
Seeing one that his mood has changed, yea he could be having a bad day but lets look at
1]His vision has changed
2]Looks at you like a stranger
3]Dragginging right leg, Is this new?
4]Fallen 4 to 5 times today
5]Agressive and strange behavior
6]I would of called 911 when all of this started, He could be having another stroke or something else, but it wount hurt to get your dad checked out. Good luck. Molly