Crush Zone on FTC Rocket—4 inches of extra T8 FTC added to the top end (fits perfectly over bottle cap bulkhead) after a very vertical nosedive onto pavement—notice how it was pushed/stretched over the bottle neck flange, the pink bits are the Easter egg that was the nosecone
Crush Zone End View—the accordion pattern from the end is a "Star of David": overlapping concentric triangles rotated 180 degrees from each other, the rest of the rocket was unharmed