[true story/no shit/there I was] Tasked to do an aerial video of a ground Tactical Operations Center (TOC) for camouflage evaluation, I was up in a Huey helicopter. The obliques were easy, just sit in the aircraft with the side doors open and shoot the video while flying in a circle around the TOC. Vertical video looking straight down over the TOC; however, was made a little more complicated by the Huey's landing skids being in the way.
The usual procedure involved donning a body harness that was tethered to the inside of the aircraft, standing on the skid, and leaning out 10 to 15 degrees for an unobstructed view with the camera. The length of the tethering strap was pre-adjusted. There I was, standing on the right-side skid and leaning out while shooting video of the TOC when...
The proximity alarm sounded in the cockpit indicating the Huey was too close to another aircraft. The pilot instantly followed standard procedure for avoiding a collision and made a hard right bank rolling the Huey over towards its side. I felt the skid dropping out from under my boots and a sense of leaving the aircraft. A moment later I was slamming the inside of the aircraft as the crew chief had grabbed my tethering strap and yanked me back in with all the strength he could muster. A second later and I probably would have ended up hanging against the fuselage.
The Huey was now way over towards its side and looking straight out the side door was to be looking almost straight down. I saw below us another Huey, with its side doors open, also making an emergency right bank and rolled way over towards its side. I could see through its open doors to the ground. I glanced back over my shoulder at the crew chief and through the open door on the other side (now facing up) I saw yet another Huey with its side doors open, making an emergency right bank and rolled over towards its side. I could see through its open doors to the sky.
The pilot was cursing the congested air corridor, my unit which requested the flying mission, me and he may have mentioned my parents in the rant. Three rotary wing aircraft, crossing paths one above the other, had set off each other's proximity alarms. Everyone had a little excitement that day. The camouflage evaluation videos came out pretty good too. [true story/no shit/I was there]
Nowadays, they'd just send up a drone.