Plus Bardock is from a movie which are notorious for ignoring regular conventions of even the show, like Cooler's return where somehow Goku and Vegeta managed to overpower the entire Geti Star. Holding breath could work but you would have to be extremely quick about it plus if anything manages to knock the air out of you, one would quickly be sucking vacuum. You might be able to hold your breath for a long time, but probably only a few minutes at best, which wouldn't be enough time to get any good distance from Earth's atmosphere without having to head back for a breath.