But fans of the show appear to have other ideas and are speculating that it is in fact the Queen Vic landlord's son Lee who was under the double decker.
Viewers saw Lee leave for work following a heated exchange with Whitney, played by Shona McGarty, but did he pick up his wife's phone?
"Pipe down, pipe down," Mick shouted, before turning to face the bus and lamenting: "Whitney."
EastEnders fans are speculating that Lee Carter is dead and not Whitney, as Mick suspects
Mick claimed it was Whitney under the bus after hearing her phone ringing
Bet lee's been killed because he's leaving!
But despite Mick's assumption, fans are not so sure, with one tweeting: "That ain't Whitney under the bus either to obvious it's gotta be Lee #eastenders (sic)."
Another added: "@bbceastenders EPIC EPISODE! VERY DRAMATIC..SEEMED LIKE I WAS WATCHING A MOVIE! I RECKON #LEE IS UNDER THE BUS?! #EastEnders."
"@bbceastenders bet lee's been killed because he's leaving!!" speculated one viewer, before another chimed: "That ain't Whitney under the bus either to obvious it's gotta be Lee #eastenders."
Albert Square was thrown into turmoil after being hit by a double decker
The most dramatic Eastenders exits
Thu, May 19, 2016
With soap legend Peggy Mitchell leaving Eastenders for good, we take a look back at the most dramatic exits from the series
1 of 18
Peggy took an overdose after her cancer returned
EastEnders fans sent Twitter into meltdown with their speculations
Martin Fowler was rescued by residents after they lifted the double decker
The killing-off would make more sense as actor Danny-Boy Hatchard, 25, was written out of the soap last year.
Speaking at the time, a BBC source said: "This was a tough decision but sometimes to create big story lines characters need to come and go."
Danny-Boy has played Linda and Mick Carter's son since 2014.
EastEnders continues Thursday at 7.30pm on BBC One.