Chuck Jones's 'Zipping Along', the fourth cartoon in the Road Runner series, is notable for how it increases the relationship between the Coyote and the audience. The gags are hit and miss, ranging from hilarious (the mouse trap gag is still among my favourites) to dull (the bomb and the kite) or genuinely weak (the double "meep meep" from the Road Runner and the dust he leaves behind). However, the reaction shots of the Coyote are all priceless and there are many more of them than in the opening trio of cartoons. His endearingly defeated glances to the audience are capable of turning a weak gag into a hilarious one. For example, the nonsensical joke with the giant magnet and the TNT is improved 100% by the extremely brief look of horror the Coyote shoots our way a millisecond before the explosion. It's the tiniest piece of animation but it's monumentally effective. There are numerous little moments like that all the way through 'Zipping Along', considerably heightening its enjoyment factor. It's also notable for the fact that it is the first Road Runner cartoon not to close with the Coyote being hit by a vehicle which the Road Runner is on board. He is hit by a vehicle at the finale and we do hear a "meep meep" afterwards but it doesn't come from the Road Runner!