A bubble pops near the door, which then falls over and crushes Squidward, who moans "Ohhh! Upon arriving back and seeing the destruction, Squidward angrily tells the two to leave and he slams the door (which is somehow still standing) shut.
They whisper a message into the bubble wand instead of blowing into it, and when the bubble pops, the message can be heard.
Spy Buddies / Boat Smarts / Good Ol' Whatshisname85.
A Flea in Her Dome / The Donut of Shame / The Krusty Plate91.
Squidward decides to invite Patrick and Sponge Bob to a dinner party (without telling either of them that the other is coming) in an effort to repair their friendship.
This drives Squidward over the edge and he flees his house, hiding in a trash can outside.