HarleyquinnBetwixt the stix, Illinois USA1,707 posts
stringman: just saw this did not know it was happening.
Didn't watch the vid, but sinkholes are very dangerous!
They are basically plugged openings to caves. If you happen to be swimming in one when the plug breaks....bye, bye! As well, if you're speluenking in a cave and the plug breaks, can be just as deadly!
A side note to the adventurous, NEVER go into a cave if it's raining or going to be!
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