NEW : Other daredevils have tried their luck , but farther downstream . Next on his to - do list ? The Grand Canyon . Wallenda had a near fall after stumbling on a bridge above Seattle 's Inner Harbor . Pumping his fist in the air , Wallenda sprinted the last few steps on the wire . His great - grandfather was killed at the age of 73 trying to walk between two buildings .
NEW : Other daredevils have tried their luck , but farther downstream . Next on his to - do list ? The Grand Canyon . Wallenda had a near fall after stumbling on a bridge above Seattle 's Inner Harbor . His great - grandfather was killed at the age of 73 trying to walk between two buildings .