Haven't seen any video of this, but you'd have to wonder if there is a better way to keep track of where the Javalin lands then having judges on the field. I'm sure people remember seeing that one judge a few years back getting one in the chest.
You'd think stuff like this might happen more often given how fast the javalin is being thrown.
(
Track and field line judge Lia Mara Lourenco is helped after a javelin hit her in her foot during 'Brazil Trophy,' a national track and field competition)