Edwards' triple jump record was freaky, he glided across the phases whereas if you watch most jumpers they tend to have one "hard" phase which seems to slow momentum.
Edwards performance in that particular Worlds was staggering - two world records in the final, if I remember correctly. As you say, he seemed to glide through the phases - I've not seen anything as technically perfect from a jumping point of view before or since. An example of when everything goes right… text book (and then some).
As others have pointed out, some of the other records are dubious to say the least, and may never be bettered.
Great to see Christine beating Kathy Cook's ancient British record in winning the 400m by a nose (almost literally). She's a special athlete - her ability to come back from the dead in races is staggering. Presumably she has superb sprint endurance and loads her speed towards the end of races (E.G start relatively easy and relaxed, crank it up at the race goes on to reel in those in front of her). There was a stat in one of the newspaper reports yesterday that said that the combined winning margin for her three championship golds (Worlds 2007, Olympics 2008 and Worlds 2013) is 0.11 seconds. That's crazy.