Corrected entry: Early on, The Flash's immense speed caused his clothes, and those of people he was carrying, to catch fire because of the air resistance. Gave him an excuse for the suit, but this effect was fairly quickly forgotten, with him frequently carrying civilians or running out of costume with no ill effects at all.
Corrected entry: After being broken out of prison by Mark Mardon, the Trickster sings, "Deck the halls with body parts from a girl named Harley." This is a reference to his roles as the Joker in "Batman". (00:09:50)
Correction: He doesn't say "Harley", he says "Holly". It has nothing to do with his role as the Joker, but just changing the lyrics which normally go "Deck the halls with boughs of holly."
Correction: This is half-true. Barry's connection to the Speed Force allows for some sort of shield around his body that protects him from harm while running. In the beginning, his bond with the Speed Force is weak, whereas later on, he becomes closer and closer to the Speed Force, allowing him to run faster, defy laws of physics, etc.