Blythe further testified that he was not under the influence of alcohol during the concert and that he had never used any drugs . Chris Adler , Lamb of God 's drummer , testified that he had not seen anything from the back of the stage and further proclaimed that Blythe 's aggressiveness is only a stage act . According to Adler , Blythe is a calm , moderate , and well @-@ read person . The defense also presented videos from various Lamb of God concerts in order to demonstrate that metal music is very energetic and that Blythe regularly cheers to the crowd , but not to encourage people to climb the stage .