People were left shocked and horrified after a snake catcher shared how snakes might force their way inside homes.

Taking the internet by surprise, snake hunter and reptile wrangler Mark Pelley shared a video that explains how snakes end up inside houses much to the surprise of homeowners.

“I’m frequently asked how snakes enter the house, so I thought I’d show you,” the Aussie snake hunter captioned his video.

In the clip, a highly venomous eastern brown snake is seen flattening its large body to squeeze through the narrow gap underneath a door.

“Eastern brown snakes — even a large one like this — have the ability to flatten themselves out and gradually squeeze under tiny gaps under doors,” Mark explained.

“I frequently find them inside Australian houses in summer.”

Speaking to Yahoo News Australia, the snake catcher added: “All snakes endemic to Melbourne are venomous and have the ability to flatten themselves out to squeeze into tight spaces.”

Nevertheless, not all snakes have the same ability to flatten themselves when needed, Mark said.

After sharing the “horrifying” clip on social media, thousands of viewers were left mortified.

“I could have gone the rest of my life without knowing this,” someone wrote.

“I’m sleeping with my eyes open and the light on from now on,” another said.

A third joked: “Thanks, that’s all I needed to see before bedtime.”

After many viewers asked for advice on keeping the slithery animals out of their homes, Mark said there was no 100% successful method to keep snakes at bay.

He suggested, however, that installing draft stoppers and door sweeps underneath the door may help deter reptiles from your home.

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