I accidently hit CTRL+1. I love shortcuts, but CTRL+1 did suprise me, then I tried CTRL+2, another suprise. So I wondered what I was executing first of all, and then wondered what all the possible shortcuts are, so I looked it up.
CTRL+1 - SP_WHO
CTRL+2 - SP_LOCK
http://msdn.microsoft.com/en-us/library/ms174205.aspx
In case you never looked up shortcuts with SSMS, there are a ton of them.
If you have a boring saturday morning or are between projects, take a poke around SSMS shortcuts, you might find something handy you never knew was there.
Al.