Headscratchers / Ice Age: Continental Drift

• Is there a reason Gupta is welding a knife that looks exactly like Buck's knife from the third movie?
  • It's unlikely, because Buck was seen in the start of the movie riding Rudy. On the other hand, that was before the continents split and the oceans appeared in-between [and further more, the continents split exactly on the place where Buck was], so it is entirely within the realm of possibiliy that the Lost World of the dinosaurs was flooded and he was marooned, where Gutt found the knife.
    • Considering all the skulls they have for grappling, it's likely that they either found a skeleton with a tooth that big or they killed a prehistoric shark.
    • Or alternately, the tooth belongs to Momma T-Rex. It's entirely likely that when the Lost World of the dinosaurs was flooded and she was marooned and badly injured, Gutt and his crew found her and killed her, Gupta taking her tooth to use as a weapon.
  • Well, Buck returned for Ice Age: Collision Course, so maybe Buck did just lose his knife while the continent broke apart and the pirates found it.
  • Alternatively, it's just a regular knife that was designed to resemble Buck's as an easter egg.
• The sirens - are they magic or something? It's definitely more than just a mental illusion, since Scrat was able to pound one disguised as an acorn into the ground like any other acorn, and then the others transformed into floating acorns and pounded him.
  • While I'm not entirely familiar with how the siren mythology goes, they're rarely mental illusions, but real objects, such as an element having been enchanted with a magic presence in the shape of/or with the voice of a beautiful woman, luring the listener in by their beauty/their voice's beauty before killing the victim. As an example, watch the siren scene from Dreamworks' Sinbad: Legend of the Seven Seas [1]
• How exactly did Captain Gutt know where the continent was and how did he beat Manny and the gang there, despite them having a huge head start on him?
  • Considering his reputation as a skilled seafarer, the most likely explanation is that he was able to work out their most likely point of origin and use his superior boating experience to get there ahead of them, considering that Manny, Sid and Diego have never been shown on a boat before and would therefore be improvising and learning how to sail as they're doing it.
• At the end of the movie, Scrat finds Scratlantis, and somehow, a saber-tooth squirrel played by Patrick Stewart talks... How is that even possible? The franchise had established that saber-tooth squirrels can't talk, They can mut, moan, yell, scream, sigh, and be excited, but not talk. Even the previous film respected that with Scratte.
  • Maybe the inhabitants of Scratlantis are a more evolved subspecies of saber-tooth squirrels?
  • Also, why isn't Scrat shocked that he just (inadvertently) caused the deaths of numerous members of his species over his obsession with acorns?
• What destroyed the land bridge? I always assumed that land bridge was destroyed by the earthquake but the Villains Wiki claims it was Captain Gutt and his crew who destroyed it, but realistically speaking it would had been impossible for a group of seven animals to destroy such a monumental landmark. What gives?