It became the inescapable soundtrack of the summer: the uplifting melody of Jess Glynne's 2015 dance-pop hit "Hold My Hand," followed by a chirpy voice declaring that nothing beats a Jet2 holiday. Over the last few months, the British travel agency's advertisement has become a viral TikTok sound, serving as the ironic backdrop for millions of things-gone-terribly-wrong style disaster videos.