Summon

A type of fad in which the aim is to post a series of words or phrases in a particular order, without any mistakes or interruptions. A succesful summoning is often accompanied by an ASCII image of the character summoned.

There are several summons which are or have been popular on Board 8.

Captain Planet
The most common summon, and the one that really kicked off the whole fad. Taken from an old cartoon series, the summon sequence was used by the 'Planeteers' to call on Captain Planet, a hero who would take pollution down to zero. He was their powers magnified, and was fighting on the planet's side.

Earth!/ Fire!/ Water!/ Wind!/ Heart!/ By your powers combined, I am CAPTAIN PLANET!

SineNomine
See Sine's own article for full details. The summoning sequence is included here for completeness.

JUSTICE/ HONOR!/ INTEGRITY!/ HORNINESS!/ 1337NESS!

Captain Incest
Again, see the full article for details. Assuming the 'AKA ertyu' thing ever gets replaced with the real article again.

P!/ I!/ H!/ B!/ By your powers combined.../ I AM CAPTAIN INCEST!

Team Rocket
Popular even before Captain Planet took off, this is not exactly a summoning, but works on the same principle- participants would attempt to post each line of the Team Rocket theme song from the Pokemon anime in order.

Prepare for Trouble/ Make it double/ To protect the world from devasation/ To unite all peoples within our nation/ To denounce the evils of truth and love/ To extend our reach to the stars above/ Jesse/ James/ Team Rocket blasts off at the speed of light/ Surrender now or prepare to fight/ Meowth! That's right!

It should be noted that due to the length of the song, it was rarely, if ever, completed.