Sorry, this little distraction is about to make himself very very annoying. Trunks barely manages to get above the beam from the Oozaru's mouth. Which does put him in a very good position to do his own ki blast, however, right between the eyes. Trunks is also only holding back not to kill...

Which is what he'll keep doing. Striking out with ki bursts and hand-to-hand as needed. Whatever he needs to do to keep Vegeta's attention on himself.