Avengers #88

« The Summons of Psyklop »: Investigating a friend’s disappearance, Captain America and the Falcon battle voodoo cultists in Louisiana, then travel to a remote Pacific island with Thor, Iron Man and Goliath. The Hulk, held captive by the U.S. Army thanks to Reed Richards, Charles Xavier and Tony Stark, vanishes and is transported to the same isle, lair of Psyklop, last scion of an insectoid race that worshipped certain Dark Gods. After battling a giant slug, the Avengers invade the stronghold as Psyklop shrinks the Hulk, who continues shrinking until he disappears completely. Psyklop teleports the heroes back to New York with no memory of their adventure.