How Would You Feel if You Were Surprised by a Giant Whale Like This?

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WARNING: Understandable profanity is used in this incredibly startling video.

Spelunking Gone Wrong: This is What it Looks Like to Be Stuck in a Cave Filling With Water

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Warning: Video contains strong language.

It took another three hours of crawling to get out the cave a different way.

DON'T. LOOK. DOWN.

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DON'T. LOOK. DOWN.
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According to staff at Willis Tower, the cracked portion you see here was a part of the safety seal of the observation platform and not the glass itself. Still, that's the last thing you want to see when you're suspended that high in the air.