Rolling mill goes nuts

Hey there everyone,
This is a video showing a rolling mill in an iron molding factory just going crazy and throwing liquid iron all over the place,

.
.
.
https://thumbs.gfycat.com/PoliteOpulentChrysomelid-size_restricted.gif
.
https://gfycat.com/PoliteOpulentChrysomelid

luckily the report said that nobody got hurt.