There's no signs of him being interested in that fast moving red light, or the source of the sound, instead focused on the bright ki in front of him. And for a moment it almost seems like it's working, pausing in any attack as Trunks spoke.

Before signs of light shining out between his teeth, Vegeta's jaw snapping open to fire out a large and powerful blast of ki at Trunks. Luckily thanks to the angle it will shoot over the horizon rather hitting anything in the immediate vicinity. Get out of his way, little distraction, he has no time for you.