Never had the pleasure. But I've got a special affinity with Mr Wokka. I spent the best years of my life flying in them, marshaling them, hooking under them and controlling their LZs. I felt the vibration more than heard it this afternoon, and knew where to look and what for. Brought it all back. It's more than half a lifetime ago for me, but dang, I miss them.
As
@PFGEN says, I'd inhale their exhaust like dîckheads do smack. Dunno what it is at the root of it, but the CH-47 is the King of helicopters. I've spent plenty of time in powerful military helos of many types, but give me a Wokka any day. The King.