Hakan's invulnerability to projectiles during EX Oil Shower - Super Street Fighter 4 Note - sf4answers

At GDC 2010, Seth Killian demoed Hakan in two videos.  At 3:54 of the first video, Seth says that the EX Oil Shower will "go straight through fireballs".  At 5:35 in the second video, Seth clarifies this statement saying that the EX Oil Shower doesnt swallow fireballs, but it will allow fireballs to pass straight through him.

Unfortunately, Seth didn't actually demo this.

However, Ruliweb has a few Super Street Fighter 4 pre-release videos of Hakan vs. Juri gameplay.  This particular video demonstrates the effect and clarifies Seth's statement:

1:26 - Hakan performs an EX Oil Shower.  After the Oil Shower move is complete (and Hakan regains control) he performs his slide while Juri performs her low projectile motion (which travels along the ground).  Hakan slides right through the projectile.  Unfortunately, it was the blow that beat Juri for the round, so the question of whether or not Hakan is invulnerable to multiple projectiles remains to be seen.