What are examples of allusions

Imagine seeing something really weird in front of you but it's not there

1. Your backyard is a Garden of Eden. (Biblical allusion)

2. I guess I should see this message about a new job as my burning bush. (Biblical Allusion)

3. When you feel betrayed by a friend, you can say, "You too, Brutus?" (allusion to Julius Caesar-Brutus betrayed Caesar)

4. You're a regular Einstein. (allusion to a historical figure)

5. When your parents learn about your new plan to raise money, it's going to sink like the Titanic. (allusion to a historical event)