On my visit to thorpe today, I had my first ever back row ride on Colossus, I was pleasantly suprised since I heard so much that the back row was awful. I didnt actually get much headbashing, only on the bottom of the drop and transition into the cobra roll, the rest really was suprisingly smooth. The only bad thing was how little legroom there was, the restraints slightly squeezed my legs but thankfully it didnt affect my ride on the back row. I still prefer the other rows though