Their fourth album, "Reise, Reise", is loosely inspired by the crash of Japan Airlines Flight 123. The band have also occasionally delved into politics with their lyrics. "Amerika" is a critic of the cultural and political imperialism of the United States all over the world. The lyrics of the song "Deutschland" contain the lines "Deutschland! / Meine Liebe / kann ich dir nicht geben" (Germany! / My love / [is what] I cannot give you), which conveys the band's inability to have unquestioned patriotic feelings. Rammstein are particularly known for their over-the-top live performances, making such extensive use of pyrotechnics that fans eventually coined the motto, "Other bands play, Rammstein burns!" (a play on Manowar's song "Kings of Metal", which states that "other bands play, Manowar kill"). Following an accident in Berlin on 27 September 1996, in which some burning decorative parts of the stage collapsed, the band started using professionals to handle the pyrotechnics. Lindemann subsequently qualified as a licensed pyrotechnician, and often spends entire songs engulfed in flames. He has suffered multiple burns on his ears, head, and arms. The band's stage costumes are also known for being outlandish. During the Reise, Reise Tour, they wore lederhosen, corsets, and military-inspired uniforms with German steel helmets; during the Mutter Tour, the group kept to the themes of the album artwork and descended onto the stage from a giant uterus while wearing diapers. During the "Völkerball" concert, among others, Lindemann changed costumes between songs and dressed accordingly for each. For example, for the song "Mein Teil", he was dressed as a blood-soaked chef; in "Reise, Reise", he dressed as a sailor. The rest of the band each wore their own preferred costume, but none quite as bizarre as Till's. The band's flair for costumes is evident in their music videos as well as their live shows. In the "Keine Lust" video, all members except Lorenz are dressed in fat suits. In the "Amerika" video, all members of the band wear astronaut costumes. Since the Mutter Tour in 2001, Rammstein have worked with stage designer Roy Bennett, who helped the band in developing the look of the stages. With the Ahoi Tour in 2004/2005, the band began using a two-level stage, with half the band playing the lower level and the other half on the upper level.