The Comic store.

On the internet (probablly looking for porn).

Angry.

Showing Bart that Scratchy's arm is worthless.

With an Alien shirt.

A moment before he is blown by a French nuclear missile.

Telling Bart and millhouse about the Radioactive man movie.

After he told Millhouse and Bart about the movie thier hats went off (he is got to fix his vent!).