my first guess: siblings pulling a prank and knows the house is loaded with cameras so he makes an appearance on all of em just to freak yeh the hell out.
Actually by the letter, just being "in the process of" [SIZE=-1]unlawfully and forcefully entering may have been enough, and while I wouldn't advise it nor want to be the guy testing it in court, entering that gate into that enclosed patio was likely enough to justify use of lethal force by the resident in Florida.[/SIZE]
We live in a rural area, most people in my neighborhood would have NO problem drawing down on him considering he/she has a weapon in hand. Not very smart in our current times prank or not.