That's perfectly legal if he's coming in to land or if he has low level approvals.
One thing it isn't is intelligent. You should never have those sorts of angles of bank at low level unless you have alot of airspeed to play with. Even then it wouldn't be real smart for your average CPL guy.
On saying all that photos can lie and he might be further away and higher than what it appears.
A Cessna 185 speared in around Sydney doing something similar in the 90's if my memory is correct