Chelsea (Zaraah Abrahams) didn't think twice about dialling 999 when she came home to find her husband Gray Atkins (Toby-Alexander Smith) lying in his own blood - all the while, Kheerat Panesar (Jaskiranjit Singh Deol) tried desperately to explain that Gray had attacked him first.
But some viewers are wondering how Chelsea managed to make it through to emergency services at all. Watch the clip here:
After walking in to find her husband unconscious on the ground with Kheerat standing over him, Chelsea was horrified when she learned that no one had called for help.
Speaking to an ambulance services staff member, Chelsea gave her address to the emergency services and named Kheerat as Gray's attacker - another move that infuriated viewers watching at home.
In her panic, Chelsea held her iPhone upside down while dialling 999 and speaking to an operator.
Fans realised that her phone's charger port - located at the bottom of any standard phone - was nowhere to be seen.
Then, suddenly, in the final moments of the scene, the phone is the right way around again.
Very convenient, Chelsea...
Eagle-eyed viewers spotted the mistake and took to Twitter to discuss.
One amused fan wrote: "Not Chelsea making a call with the phone upside down & then it’s the right way round.. @bbceastenders #Eastenders".
A second asked: "Did anyone else notice when chelsea rang for an ambulance for Gray her phone was upside down 😂 #EastEnders @bbceastenders".
"Not Chelsea phoning an ambulance with her phone upside down 😭😭😭 #Eastenders", tweeted a third.
One rather irritated viewer tagged EastEnders on Twitter and wrote: "@bbceastenders… can you explain why I’m watching an error that should have been picked up by your editing team? Look at the phone!! "
Chelsea definitely didn't get away with that one, then.
You can watch EastEnders on Mondays, Tuesdays, Thursdays and Fridays.