Might be to express a possibility:
"Have you ever looked at you pet and thought 'I think they might be broken'".
[video width="720" height="1280" mp4="https://www.starenglish.es/wp-content/uploads/2020/12/126985845_1085869511871203_5363861832450018298_n.mp4"][/video]...
To do something by oneself:
To do something without any help or assistence.
"The cat rode the skateboard by itself"
"My one-year-old nephew can eat by himself"
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To fall over backwards
Literally- To fall onto your back:
"The dog fell over backwards"
Figuratively - To make an extra effort to do something:
"She fell over backwards to organise his surprise party,...
To have second thoughts about something/ To think better of something:
To change your mind after assessing the situation.
The cat had second thoughts about jumping onto the furniture.
The cat wanted to...
To pass out:
To go unconscious temporarily, to faint.
The dog passed out when she tried to cut his naills
We could also describe the dog as a 'drama queen'
[video width="640" height="640" mp4="https://www.starenglish.es/wp-content/uploads/2020/11/To-pass-out.mp4"][/video]
To hold (somebody) back:
To stop or impede somebody from progressing or advancing.
[video width="640" height="1292" mp4="https://www.starenglish.es/wp-content/uploads/2020/11/125325093_868455963891884_6687547356508023361_n.mp4"][/video]
Video from @discoverwildlife...