^ According to Steve the whole Cadillac thing was because of how low Takuma’s Hienshippukyaku goes; kinda like a lowrider or something of that nature. Hence, Cadillac kick.
As far as chants go, you’ll hear a lot of player name chants, especially for U.S. players. There’s also the usual “AY! AY! AY!” for juggle combos in non-Tekken games (eg. Shen Woo HD Combos, or Spark’s Hakumen air juggle from last year’s EVO) You’ll sometimes hear peeps (I also do this…A LOT) yelling out specific moves as well (eg. HADOOOOOOOUUUUUUUUUUUUUKEEEEEEEEEEEEEEEENNNNNN in UMvC3 or DOOOOOOOORRRRRRYYYYYYYYAAAAAAAAAAAHHHHHHHHHHH in KOFXIII)