A few other people did it and I might've more than once.
Bioshock's 'First Few Minutes of Gameplay' are out; similar to when Portal 2 did this, it isn't totally game-revealing but it'll sort of spoil a bunch of jokes. Its looking good. Also, I finally watched the Metro: Last Light gameplay trailer and that's looking really good too.
[yt:x98ya1gl]http://www.youtube.com/watch?v=bUo1PgKksgw&hd=1[/yt:x98ya1gl]
I had something similar. Are you using a Logitech mouse?
I haven't had any mouse issues to speak of, but a month or two ago my keyboard started holding down keys randomly (like I'd be typing and it'd go like thiiiiiiiiiiiiiiiiiiiiiis), I think the keyboard was just dying (it was a cheap ass-keyboard that I'd had for 9 months) so I went for an older but more reliable mechanical one (which I ended up hating because it plugged into a PS/2 port and I couldn't press more than 2 keys at a time)
48 hours without Internet. I am scarred for life.
Do we even want to know what happened?