Icelandic Horses fall through ice. Sometimes people do really dumb stuff.
"This is a video from animal planets "Uncut & Untamed". As a horse lover I find it amazing that all these riders would risk riding there horses on a frozen lake without checking to see how thick the ice is. I feel so sorry that those poor horses had to go through that ordeal & thank God the iceman jumped in to save them. What a courageous man."