Only six days earlier an unidentified fan 's well - aimed snowball foiled a field goal by the San Francisco 49ers .
Only six days earlier an unidentified fan 's well - aimed snowball thus helped the Denver Broncos to a 17 - 16 win .
Only six days earlier an unidentified fan 's well - aimed snowball foiled a field goal by the San Francisco 49ers , and thus helped the Denver Broncos to a 17 - 16 win .