You can DO that???!!! That would've saved me a helluva lot of effort.
The first time I beat the room I did it by standing in the gap between two spikes, but it was completely on accident - I fully expected to be killed, and was pleasantly surprised when I wasn't.
Each subsequent time I tried to get through that room, though, I couldn't hide in the gap no matter how hard I tried, and had to beat it the way Xylon Lionheart described it. It requires too high a level of precision, and the first time was absolute blind luck.