Quite often we are taxing out when pax are boarding on the adjacent bay and we almost immediately turn north- up the hill- and point the engines directly at it. I've started to apply more thrust initially so that I'm at idle
I personally like to use at least 90% thrust here (more on a RR) as I try to blow the passengers back towards the QANTAS jets and discourage them from hopping on a Jetstar jet. So far i have only had limited success ...