You always hear "crushed like a soda can," but I'm pretty sure that the body wouldn't be much smaller than normal. The person wouldn't be breathing, so nitrogen narcosis wouldn't be an issue. Would this just be an "all over body bruise" kind of thing?
The main issue is not the absolute pressure, but the pressure differential: have you ever experienced ear pain when diving or during an airplane landing? That pain is not caused by the pressure, but by the pressure difference between the inside and the outside of the ear.
Likewise, if the entire body is exposed to the same pressure, it won't be greatly affected, except for the part containing gases, which will experience a contraction (because the compressed gas will reduce its volume): so lungs and bowels will collapse under the increased pressure, while all the rest containing liquid will just adapt to the change of volume produced by the above.