the.com/whiplash

the injury that arrives a day late, like regret with a neck brace

means A neck injury caused when the head is suddenly jerked backward and then forward, typically in a rear-end car collision.

from A literal compound of 'whip' and 'lash' — the lash being the flexible tip of a whip and the cracking motion it makes. The word long described the snap of a whip's end before the early 20th century lent it to medicine, where the head's violent back-and-forth flick eerily mimics that same cracking arc. 'Whip' itself is old Germanic, related to words for quick darting movement; 'lash' shares roots with the idea of a sudden stroke or blow.

delayed onset
Symptoms often peak 24 hours after impact
low speed
Crashes under 15 mph still cause it
film twist
Won three Oscars for a drumming nightmare
head weight
Neck whips an 11-pound skull violently
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