They were walking ON A FROZEN LAKE WHEN spotted something bizarre

There are a lot of people who believe in extraterrestrial life (including me) . Most have little evidence to reinforce their beliefs , which always makes these people seem crazy . 

But what these guys found in a lake is enough to make even the most skeptical person to believe there might be something else out there . Take a look at these things and see if you have any plausible explanation for it there.

Watch this video from the frozen lake and tell me what you thin kis: 

What is this? Give me a reasonable explanation , because I need one. I really need to believe that these things are not alien eggs, if not, I will not be able to sleep again.