Originally Posted by Barad
Don't worry I was haha.
It turns out a few of them just weren't registering. Some of the ones along the canal in the city are really tight, not in height but width so I guess the blades of the heli were scraping the walls and wasn't counting as me flying under them. One of them took me a good 10 attempts to finally count, everything else including knife flights easy. Got my 1k finally!
I found a couple of the knife flights harder than the under the bridge challenge. I am more comfortable in the helicopter and spend way more time in them. I remember one knife flight required me to wait until I passed a building and then drop low to knife between two buildings very close to the ground. That one drove me mad.