In Eret’s boat, when Astrid says “He can be really persuasive.” (remember how Hiccup ‘persuaded' her? That's right,
unintentionallyRomantic Flight). In that same scene, Hiccup says to Eret “I can change your [mind]. Right here, right now.”
If he hadn’t been interrupted, he would have taken Eret on Romantic Flight 2.0.
Eret. Hiccup. Flying together over the clouds. Imagine the music. Omg.