If that was what Allen considered nothing, Vash wasn't sure he wanted to see the something. Then again, this was coming from a person whose "nothing" was three shots in the side - but the Plant was firmly under the belief it was different for everybody else. Still, he wasn't about to press it.
The cafeteria gave a perfect excuse not too. "Hah, you too? How can we manage to ignore stomaches during the fight, and then get gnawed out by them later?" A somewhat-whining, rhetorical question, Vash was shuffling over to the doorway, intent on grabbing his gun and taking off toward the free food too.