Stick Your Neck Out is the fifth episode of The Wild Thornberrys's second season which was first broadcast on August 23, 1999.
Eliza finds a hero in a giraffe who can see distances with his height and warn others of approaching danger. However, to Eliza's dismay, the giraffe leaves the animals for his own needs.
Only when Eliza herself is in danger herself, does the giraffe return and realize his selfishness.
This isn't much of a goof, but the lioness climbs a tree that Donnie is in. In real life, lions are able to climb trees, but it depends on the size and how much it can support its weight. Also, lions don't frequently climb trees to catch their prey.