Answer:
1.I saw the spider and freaked, jumping out of my chair.
2.After watching the horror movie, my little sister freaked and refused to sleep in her own bed.
3.I tend to freak when I see a needle, so getting a vaccine shot can be a nerve-wracking experience for me.
4.The loud thunder outside made the dog freak, causing him to hide under the bed for the rest of the night.