"I got one day to recover, then it's LA to Activision to get a glance of a top secret project on Monday...Cannot wait !!!" wrote Hammer in a Twitter entry, found by Destructoid.

Whatever the reason for his visit, Hammer came away impressed: "Activision was fantastic ...action!"

Hammer was possibly there in connection with one of Activision's many music-based properties, such as Guitar Hero or the upcoming DJ Hero.