Was out hiking on Camelback Mtn in Pheonix, AZ last month and the police helicopter was bringing supplies up to rebuild a landing spot for emergency evacuations.
#1 From the trail below the landing pad at 1/60 ss
#2 Flying down the mountain for another load of supplies 1/60 ss
#3 From above the landing zone, shooting into the sun 1/60 ss
#4 Going for some prop blur 1/40 ss
#5 A quick tweak of the shutter speed to 1/25 of a second gives a full disc of prop blur