if your trying to air out of a smaller quarter with less tanny its going to be harder and require a lot more bunnyhopping at the top.
if your trying to air out of a larger quarter i.e. 6ft + then just go fast and ride up it untill your front tire hits the coping. that is a good indication of when to pull back a little and air out.
This quarter is 7ft tall and has some awesome pool coping at the top of it. Deff fun to ride.