the size of the warhead has to be large enough. ship launched missiles are large enough, and so are target drone aircraft.
"Ultimately, the case was thrown out due to the fact that The Fifth Element only used "tiny fragments" of The Incal's story, rather than copying it wholesale. There's also the fact that Moebius had actually contributed concept art to The Fifth Element while it was in production and a number of films, including Blade Runner and The Matrix have drawn on his visual style. "
https://collider.com/fifth-element-alejandro-jodorowsky-luc-besson/
ice ice baby and underpressure are completely different songs.