The discussion revolves around multi-stage high pressure, high altitude water-powered rockets and the safe use of these types of rockets in educational settings. Users caution against the potential hazards involved in flying Whoosh rockets, emphasizing the need for supervision, particularly due to the risks associated with ignited fuels and the structural integrity of the rockets. Comments reflect a nostalgia for safe rocketry practices as children, contrasting with current concerns about safety in more robust rocket designs.