Please help me with sentence

Hi, all.

Context: Derek is standing on the top of a scaffold when a man on the ground starts shooting at him. Derek quickly lays himself flat down on the scaffold to avoid being hit.

What is the most natural way to write the sentence in the context without it sounding like he throws himself off the scaffold? Will one of these be good?

1. Derek threw himself down on/onto the scaffold as the man kept shooting.

2. Derek threw himself flat on/onto the scaffold as the man kept shooting.

3. Derek threw himself down flat on/onto the scaffold as the man kept shooting.

4. Derek dropped down on/onto the scaffold as the man kept shooting.

5. Derek dropped flat on/onto the scaffold as the man kept shooting.

6. Derek dropped down flat on the scaffold as the man kept shooting.