On the Cliffs of Moher, there's a sign that reads: 'Please do not go beyond this point'.
It's ignored by large numbers of people, as tourists crawl out to the edge for a photo.
However, photographer Jan Mlázovský captured a photo in May this year to remind us all that the Cliffs are the site of constant erosion - and portions of the rock face can collapse without warning.
Mlázovský also took a series of stills he stitched together to form an animation of the sudden collapse.
The Cliffs of Moher Facebook page labelled it "a spectacular shot captured by Jan Mlázovský … which truly captures the sheer power of Mother Nature."
"The credit must all go to Jan for capturing this truly remarkable footage which illustrates quite clearly of the perils of Cliff walking too close to the edge," the Cliff's tourism group said in a statement.
Deaths at the Cliffs are not uncommon. Local authorities discourage the common tourist activity of walking right to the edge, or crawling to the edge to look over.
"Our message is stay well back from the edge and adhere to the signs near our visitor centre and prompts from our specialised Ranger Staff. We have 750 metres of safe walkways and viewing platforms from which to enjoy the Cliffs.
"Occasionally there are high winds or other hazardous weather conditions at the Cliffs of Moher and we follow the Met Éireann weather warning protocols.
"If visiting during periods of high winds, visitors are asked to follow the warning signs at the entrance to the coach and public car parks."