Forwards: At about 2:27, and elsewhere: "David Addison" (name of character played by Bruce Willis in the show 'Moonlighting'). Alternatively, [Derek] suggests that this is merely "What's happening?" and [John M] is pretty certain it's "They're after me"; [DC] thinks it's David Addison, so readers will have to decide from themselves. The same sample occurs reversed a few times as well.
Backwards: "There are a lot of different 'me's, you know. There's the mad me, when I get angry." [DC] [Second quote: same Sesame Street vignette as whitewater lyrics]