Rivers Cuomo, the lead singer of Weezer, is making significant improvements on his health, after puncturing his lung and damaging his spleen in a freak bus accident over the weekend.

Cuomo "went from being barely able to talk and open his eyes yesterday to partially sitting up, talking clearly, reading books and checking the internet," this according to the band's official website.

According to the site, Rivers' blood pressure has stabilized, his spleen is "no longer leaking" and his lung is "gaining strength."

Today's big test: Whether he can stand up. If so, he could be out of the hospital "pretty soon."