What an electric performance! Franzoli Electronics synchronized four singing Tesla coils together to form a band. These plasma speakers generate tones by changing their spark output. Hook them through a MIDI and you've got a concert! Here the quartet plays AC/DC's "Thunderstruck." The coils play guitar and vocals, while the percussion and bass are added from elsewhere. This quartet's latest video is a performance of "Billie Jean," but I happen to like "Thunderstruck better. It's such a classic and recognizable song (not to mention rockin') that we've seen it performed on cellos, gayageum, guzheng, tubulum, slapophone, household devices, and baby babbles. It's fun to dance to, as well.