Back in the 80's, I got hit following 165 fsw test dives in a chamber... Yes, even in a chamber you can get hit.
Was driving home from the shop about 2 hours after the last dive, noticed pain in left knee and tunnel vision so I pulled into the local EMS station and explained the situation. I had been trained as a hyperbaric medic so knew what was going on, but EMS would not listen to me or give O2 for the ride to one of the main trauma centers who wondered why I was being brought there when the only medical chamber in the area at the time was another 50 miles south.
Fortunately, while the doctors tried to figure out what to do, they slide my gurney next to a phone and I was able to reach the company who had a large chamber set-up in the shop 10 minutes from the Trauma Center and they had me brought to them.
Pushed straight to 165 few and got complete relief in 10 minutes. Did a full USN Table 6 and followed that 12 hours later by a USN Table 5.
Had to meet a Hyperbaric Physician twice over the next 2 months and was given clearance to dive.
Only explanation for my incident was the built in incident rate that was within the USN tables. While at the time, I was in peak physical condition, it is important to remember that most diving research was done using very fit US Navy divers with minimal body fat. Even as fit as those divers are, they experience DSC, it just goes with the territory. While we can all hope to be as fit as a US Navy diver, fact is we probably carry a bit more body fat and are nowhere near in the physical condition that they are.
Since my incident and only diving for pleasure anymore (no longer work), I dive NITROX often using air tables for the extra safety margin, stay very hydrated before, during and after diving and allow one full day between my last day of diving and my travel day and boarding a flight. So far it has worked and never had another incident.