Brian — claim checks

Six Flags retired X2, its 4th-dimension coaster, in late September. Coverage said more than 100 people suffered brain injuries on it in two years.

The number traces to the plaintiffs' side: NBC News reported it as “over 100 people... victims' lawyers say.” So: 100-plus people have claimed injuries through lawsuits, not 100-plus confirmed injuries.

The common defense is a category error: “X2 only pulls about 4 G, other coasters pull 5 or 6.” The one study that measured real head motion on coasters (Pfister et al., Am J Forensic Med Pathol 2009) found coaster head accelerations were milder than a pillow fight or a car crash, and concluded G-force alone cannot predict brain injury. So “4 G is normal” refutes nothing.

What the record supports: intracranial bleeding after coasters is documented in case reports, including after a 4th-dimension ride (multifocal subdural hematoma, Pediatr Neurosurg 2022). And it is rare at scale: NEISS 2004-2023 gives about 319 pediatric coaster ED visits a year, mostly neck strain.

Verdict: the retirement is real, the injury count is a litigation figure, and “it's only 4 G” is not a rebuttal.

Sources – Pfister BJ, Chickola L, Smith DH. Head motions while riding roller coasters: implications for brain injury. Am J Forensic Med Pathol. 2009;30(4):339-45. PMID 19901817. – Hori YS et al. Multifocal Subdural Hematoma in a Teenager after a Fourth-Dimension Roller Coaster Ride. Pediatr Neurosurg. 2022;57(2):138-140. PMID 35203080. – Patel J et al. Characterization of neurological injuries from roller coaster rides among minors. Am J Emerg Med. 2025;98:309-314. PMID 40997712. – NBC News, 23 Sep 2026 (figure attributed to victims' lawyers); AP, BBC, Guardian, 29 Sep 2026 (X2 retired).

---

Send me a number you keep hearing and can't source. I'll check one free. A full brief with every source is $25. [email protected]