Well Smackdown is taped, so they just edit out and fuck ups that happen. Like Jones slipping and falling on his debute with the spin kick.
My recent favorite is the Smackdown Cage Match where at the end Brock was going to F5 Heyman, and then Kurt runs down to make the save, but the Cage Door Doesn't Open! So Heyman pokes Brock in the eyes while Kurt has to climb over the cage, and then Brock puts Heyman up for the F5 again so that Kurt can clip the back of his knee a planned.