During the final verse of the I.M.P. Jingle, though Moxxie clearly shoots the Bratty Kid with a double-barrel shotgun, it suddenly changes into a sniper rifle in the next shot.
When Blitz(the o is silent) approaches Loona with a gift for her "adoption anniversary", Loona's eye color and pupils change from her usual red eyes and white pupils, to white eyes and red pupils in the close-up shot, then back to normal.