Toy Drop Landing Example: example files vs introductory slide inconsistency

[carmichaelong]

Reported from a user e-mail when using with a class: example files distributed and introductory slides have inconsistent subtalar angles.

[aymanhab]

@carmichaelong I'm planning to upgrade the models repo very soon, please let me know if you want this or other PRs in this repo for next build/release. Thanks