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Former Democratic presidential hopeful Bernie Sanders scored a round of boos after telling a gathering of his delegates at the Democratic National Convention (DNC) in Philadelphia to support Hillary Clinton. But it was a caught-on-mic moment afterward that has some people wondering if there may be a surprise in store at the convention.

Sanders endorsed Clinton’s presidential bid last week, a month after she became the presumptive Democratic presidential nominee. He told his supporters Monday Clinton is a “far superior” candidate to Republican presidential nominee Donald Trump.

READ MORE: Democratic National Committee apologizes to Bernie Sanders over ‘inexcusable remarks made over email’

“We have got to defeat Donald Trump and we have got to elect Hillary Clinton and Tim Kaine,” Sanders told his delegates gathered in Philadelphia, ahead of his appearance Monday night at the DNC.

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WATCH: Bernie Sanders booed by his own supporters after asking them to vote for Hillary Clinton

1:23 Bernie Sanders booed by his own supporters after asking them to vote for Hillary Clinton Bernie Sanders booed by his own supporters after asking them to vote for Hillary Clinton

But it was after the boos subsided and Sanders wrapped up his speech with a call to “defeat right-wing extremism,” that the Vermont senator’s wife, Jane Sanders, came on stage and made a curious statement that was accidentally caught on the microphone.

While the crowd again cheered for Sanders, Jane Sanders leaned in an said:

“They don’t know your name is going to be put in nomination. That’s the concern.”

But according to NBC, there will be no attempt to derail the nominating process.

That prompted some speculation on social media immediately following the remark.

To Every Bernie supporter! Jane Sanders said "They dont know your name is in for nomination, thats why they concerned!" Hes still in this! — Paul (@nonspamming) July 25, 2016

Jane Sanders' hot-mic moment was no accident. I'd bet money that it was planned. Very clever. Getting excited again. — Icarus (@SilverBadger) July 25, 2016

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"Jane Sanders" Wonder what Bernie will do,I hear he sold his supporters out it isn't over yet but we will see. — Josh (@FreedomGetuSome) July 25, 2016

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But, MSNBC producer Kyle Griffin tweeted a response from Sanders campaign spokesperson Michael Briggs.

“She means there will be a roll call vote and the senator’s name will be placed in nomination,” Briggs said, according to the tweet.

New: Sanders camp clarifies Jane's "hot mic" remark: pic.twitter.com/XTsquBCbNZ — Kyle Griffin (@kylegriffin1) July 25, 2016

Even if Sanders’ delegates do attempt to put his name forward on the convention floor during Tuesday’s roll call vote, it may amount to nothing more than a symbolic show of support.

And that shouldn’t be all that shocking a thing for Clinton’s camp.

After Clinton lost her 2008 White House bid to President Barack Obama, her supporters did the same thing.

“Senator Hillary Rodham Clinton’s name will be placed into nomination at the Democratic National Convention, a symbolic move approved by the Obama campaign in an effort to soothe a lingering rift with Clinton supporters,” the New York Times reported in 2008. By that point in time, Clinton had thrown her support behind Obama.

0:42 Hot mic captures Bernie Sanders’ wife telling him ‘your name is being put in nomination’ Hot mic captures Bernie Sanders’ wife telling him ‘your name is being put in nomination’ nvention kicks off, the Democratic National Committee in a still caught in a scandal after Sanders’ supporters aren’t just unhappy with their candidate losing the nomination race: as the convention kicks off, the Democratic National Committee in a still caught in a scandal after Wikileaks published some 20,000 committee emails that revealed efforts to undermine the Sanders campaign in favour of Clinton.

The revelations have led to Democratic National Committee chair Debbie Wasserman Schultz passing the gavel on to someone else to officially open the four-day convention. She has also vowed to step down from her role once the convention wraps up.

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