Under the RCA Dome, the more ethereal moments of Kiwanis Kavaliers' "Hall of Justice" show are even more foreboding and ominous. Who would have ever thought that the cartoon theme from "Spider-Man" would ever make the field? It's one of those melodies you just can't get out of your head. In black head-to-toe super-hero costumes, the corps' show has become much more focused in one short week, with the more heroic elements of the show becoming increasingly apparent."Our show today was awesome!" said Shannon Clarke, 21, the Kavaliers' guard captain. Michelle Hahn, 21 and the Kavaliers' drum major, said, "This year has been awesome!"