SLUMPED in the back seat of a Singapore cab, punchy after a 17-hour flight but rising to the challenge of the omnipresent camera, Anthony Bourdain gets a little silly about the odorous consequences of long-distance air travel combined with subpar airplane food. Bringing up one of his favorite whipping girls, his fellow Travel Channel host Samantha Brown, he grins like a schoolboy and delivers the zinger: “Sam Brown has an assistant who stands outside the bathroom and runs in and takes the blame.”