[dangerous_badman]

Ugh, I'm conflicted about what to do now. 20 minutes on I feel like I've got a bit of mobility back in my arms and upper body, so I think I'm gonna give it another little while. If I can move around after that, I'll just try and see someone about it tomorrow. If I'm still immobile, I'm going to err on the side of caution and call out a doctor or something.

Enrico,

Thanks for the link. That seems pretty plausible, especially this part:

[ QUOTE ]
How does it occur?

It can also occur from activities such as:

* rowing
* carrying a heavy backpack, especially over one shoulder
* poor posture, especially from prolonged use of a computer.

[/ QUOTE ]

Thanks all for the advice.