Conversation so far:
When did Weezer go on hiatus?
Weezer completed the Pinkerton tour in mid-1997 and went on hiatus until Weezer reunited in April 2000.
What did some of the artists from Weezer do when they left on hiatus between mid-1997 and April 2000?
Drummer Patrick Wilson returned to his home in Portland, Oregon to work on his side project, the Special Goodness.
What did Brian Bell do during Weezer's hiatus between mid-1997 and April 2000?
Guitarist Brian Bell worked on his band Space Twins during Weezer's hiatus.
What did Matthew Kelley Sharp do during Weezer's hiatus between mid-1997 and April 2000?
Bassist Matt Sharp left Weezer to complete the follow-up album for his group the Rentals.
What did Rivers Cuomo do during Weezer's hiatus between mid-1997 and April 2000?
Frontman Rivers Cuomo returned to Harvard to focus on songwriting. He formed a new band composed of a changing lineup of Boston musicians and performed new material.
When did Weezer reunite with each other after Weezer's hiatus between mid-1997 and April 2000?
In February 1998, Rivers Cuomo, Brian Bell, and Patrick Wilson reunited in Los Angeles to start work on the next Weezer album.
Did Weezer hire any other performers to replace members?
Weezer hired Mikey Welsh, who had played with Rivers Cuomo in Boston, as the group's new bassist.
Where did Weezer reunite after their hiatus between mid-1997 and April 2000?
Weezer reunited in April 2000, when they accepted a lucrative offer to perform at the Fuji Rock Festival.
Did the group Weezer go by any other band name?
In November 1998, Weezer played two club shows with a substitute drummer in California under the name Goat Punishment, consisting entirely of covers of Nirvana and Oasis songs.
Did any of the Weezer members have any emotional problems?
In the months following November 1998, Rivers Cuomo entered a period of depression.

Question: What did Cuomo do while he had depression?
Self-contained rewrite: What did Rivers Cuomo do while he had depression?