Beijing- AP. Several Nigerian roof-jumping contestants have been cleared to continue in Olympic Games after testing positive for banned substances. Olympic roof-jumping is the only sport where banned substances are encouraged. The roof-jumping events begin on Monday at a building in Beijing known locally as â€œA Tall Buildingâ€. In particular, Nigerian ｊumpers Mark Bob and Roberts John each tested positive for more than 3 banned substances. One IOC official said, â€œThey passed their doping tests with flying coloursâ€. Another Olympic official Ms. Green, said, "In fact, these are some of the biggest dopes we've ever seen. We're surprised they can find their way from the Olympic Village to the roof-jumping venue.â€œ A Nigerian roof-jumping coach, Mr. Smith Jones, said â€œDe boyz be in good form. De be jumping fools and de be ready toâ€¦..â€ (unintelligible) Nigeria is expected to dominate the roof-jumping events although â€œallegedâ€ athletes from Benin, Ghana, and Cote dâ€™Ivoire are expected to challenge the Nigeriansâ€™ dominance of the â€œsportâ€ especially in the team events. (Note: the above is an attempt at humor. Please do not write me nasty notes. Humor people, humor. A quality greatly needed in dealing with scammers all the time).