I think he means instead of using a colon to begin Vim commands, he begins by typing a space.

I started using Caps Lock as an extra Ctrl a couple months ago. It's great, except now I can't use other people's computers because I end up in caps-lock shout mode.

E.g. instead of "ctrl+l" in my browser to visit a site, it ends up:

    CTRL+SHOUT+L BROWSER TAKE ME TO FACEBOOK I COMMAND THEE