I was watching this segment from a non canon movie (which is known to have some animation mistakes such as Krilin's "Super Saiyan" aura) and Trunks seems to do the pose, and he says the words like someone firing a Kamehameha.
I was wondering if his Kamehameha scream was something made up by the dub, or if it was in the original Japanese audio, and in the case Trunks was genuinely made to fire a Kamehameha in the movie, if this is congruent with the series or does just Trunks supposedly know how to fire a Kamehameha only in the non canon universe?