Spike descended down the stairs after Angel. Spike walked through a pillar of Wolfram & Hart, insisting on an office.
Angel refused, and shut his office door on a yelling Spike.
Harmony called Spike over to Reception, “Spike, you got mail.”
Since the puzzled, Ghost Spke couldn’t open the package, Harmony did it.
Once opened, the box flashed.
Spike commenting sarcastically, moved to pass through Angel’s door, instead his body slammed against the door, knocking him to the floor
Spike stood as Angel stepped out. Spike touched himself and then Angel.
They were both solid.
Finally, Spike was corporeal again.