“Ligh blue touch paper”, ok, got it. “ ... and stand well clear” yeah yeah, stupid safety advice. What kind of noob do you think I am? I’m a rockstar 10x ninja! <firework, caring little for egos, explodes as designed>

Leading to the pun: https://www.lightbluetouchpaper.org/

(Cambridge University is associated with a light blue colour, although exactly which light blue colour is controversial, its rival Oxford University is associated with a dark blue - and of course such security research may sometimes lead to fireworks of a different kind...)

Your own fireworks is dangerous to you

But your hand rolled crypto, though, likely won't hurt you, it hurts others far away (e.g. dissidents in a dictatorship)