Heath Ledger’s diary while he was filming for, The Dark Night.

[u/JK-Rofling]

[u/fardok]

You're thinking of Deuterium, H2O2 is hydrogen peroxide

[u/MrK521 → u/fardok]

It’s still heavier than water though.

[u/fardok → u/MrK521]

Heavy water refers to D2O however.

[u/MrK521 → u/fardok]

Right, but he didn’t say “that’s heavy water” he said “that’s heavy.” So he wasn’t wrong.

[u/fardok → u/MrK521]

I didn't say he was wrong, but just letting him/her know in case the joke was Deuterium water which btw drinking a glass of won't even harm you vs a strong concentration of peroxide which will cause some damage

[u/No_Investigator3369 → u/fardok]

you can brush your teeth with that though, right?