Barney Burman and Mark Burman made 4 films together, and the 3 rated ones average 4.61, 1.45 below their career marks. The best is Piranha Sharks at 5.4.

Barney Burman averages 5.80, Mark Burman averages 6.32. Apart that suggests 6.06; together they average 4.61, a lift of −1.45.

Lift is the average of their films together minus the mean of their two career averages.