Question: What is the nickname of the person who gave Roger Ruzek a nickname?
Related documents: [0]  [DOC] Roger Brian Ruzek (born December 17, 1960) is a former professional American football placekicker. He played in the National Football League (NFL) for seven seasons for the Dallas Cowboys and the Philadelphia Eagles. Previously he played with the New Jersey Generals of the United States Football League. He was a teammate of Herschel Walker with three different teams (Generals, Cowboys and Eagles). He was given the classic nickname "Who Framed Roger Ruzek" (after Who Framed Roger Rabbit ) by Chris Berman. [END] 
[1]  [DOC] Christopher James Berman (born May 10, 1955), nicknamed Boomer, is an American sportscaster. He has been an anchor for "SportsCenter" on ESPN since 1979, joining a month after its initial launch, and hosted the network's "Sunday NFL Countdown" program from 1985 to 2016. He has also anchored "Monday Night Countdown", U.S. Open golf, the Stanley Cup Finals, and other programming on ESPN and ABC Sports. Berman calls play-by-play of select Major League Baseball games for ESPN, which included the Home Run Derby until 2016. A six-time honoree of the National Sports Media Association's "National Sportscaster of the Year" award, Berman was instrumental in establishing ESPN's lasting popularity during the network's formative years. He is well known for his various catchphrases and quirky demeanor. In January 2017, it was announced that Berman would be stepping down from several NFL-related roles at ESPN, but would be remaining at the company. [END] 
Answer: 
Boomer
Boomer