Let's look at the sentence you gave: "Jumpscare a frilled lizard, and it will fan its frill: Boo!"
Here, the word "Jumpscare" should be two words: "jump scare." Jump scare is a phrase that means to suddenly surprise someone or something.
The sentence is trying to say: if you suddenly startle a frilled lizard, it will open up its frill (the big colorful skin around its neck) to scare back. So, a clearer and grammatically correct sentence would be:
"Jump scare a frilled lizard, and it will fan its frill: Boo!"
Alternatively, you can also say:
- "If you jump scare a frilled lizard, it will fan its frill: Boo!"
- "When you jump scare a frilled lizard, it will fan its frill: Boo!"
These versions are correct and easier to understand.