Safari Al was perhaps the most obscure of Calvin's alter egos. Safari Al appeared on April 2, 1986 in a one-joke strip involving Calvin's room resembling a jungle. In it, Calvin himself took on the Safari Al persona, while his mom took on the persona of a large, King Kong-like simian.
Interestingly, the hat Calvin wore as Safari Al resembled the hat he donned in the first strip, which makes it possible that Safari Al appeared before Calvin truly did. The strip's plot--trapping a tiger--certainly fit within the character of a jungle adventurer.