It is known that twins joke about which of them is classed the "evil" one - but for one pair of 18-month-old twins, that may no longer be up for a debate.
Footage captured on a baby monitor shows young Jack Boehme waking up in the middle of the night before tottering across his crib and grabbing his milk bottle, only to hurl it at the head of his twin sister Ivy as she sleeps in the next cot.
To make the evil act even more comical, Jack then rapidly lies back down and drifts back to sleep before Ivy is even aware of what is happening - making it appear as though he had nothing to do with disturbing her snooze.
The Mirror reports that mother Cami Boehme spotted the incident as it occurred as she was watching the baby monitor at the time, but has "no idea" what would possess her son to throw his bottle at his sibling.
42-year-old Cami, from Connecticut, US, said: "The thing is, they're actually really sweet to each other and they have a special bond.
"A lot of the time, they'll just wake up and sit and play in their cribs.
"I honestly have no idea what Jack was thinking. I think he might have been trying to wake her up and the bottle just hit her head.
"We watch the monitor pretty closely. I was checking it because I could hear noises from their room.
“The funny thing is it looks like such a hard throw. You just imagine the aftermath will be terrible.
"But Ivy just sat up a little bit and whined a little bit. She didn't really cry, she just looked dazed and confused thinking 'What happened?'
"She didn't seem too phased. It was the funniest thing."
Cami posted the video to TikTok where it became a viral hit and gained 30 million views.
And the mum-of-five has loved reading the “creative” comments people have left with potential explanations for Jack’s actions.
She added: "The response online has been hilarious. I had a lot of people questioning why Jack threw the bottle, and other people saying something like 'Well, now you know who the evil twin is'.
“Lots of people were saying it was revenge, sort of like 'That's what you get for taking my Cheerios', or 'You played too long with my toy'.
“People were being pretty creative coming up with explanations for what happened.
"I think the most likely explanation is that he just wanted to wake her up to play.”
The video received thousands of comments, and other mums of twins were quick to say they related to Cami’s situation.
One wrote: "Every twin mum knows this was not an accident!"
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