Hundreds get stuck in Channel Tunnel after train failure
7 July 2014 Last updated at 16:40 BST
Nearly 400 hundred people got stuck in the underwater tunnel that connects Britain and France.
It happened when power failures meant a train broke down inside the Channel Tunnel - which runs for 23 miles under the English Channel.
Passengers had to go through special escape exits, and wait for another train to pick them up, causing long delays.
No-one was hurt and it's really rare for something like this to happen.