The 34-year-old breakfast host donned a pair of white protective gloves to present a picture of The Replicator when the 'mishap' occurred.
After a tense pause and panicked calls to go to an advert, Laura revealed that the whole thing was actually a hilarious prank.
"Now, this was a character back in the 70s. This is a special poster that is worth about £150,000 and there's only ten of them in the world."
Rather haphazardly handling the image, Laura continued: "So here we go. No one's really seen this before.
Laura, dressed in a Karen Millen navy dress and Michael Kors high-heels, attempted to pick up the picture with her surgical-looking mitts in order to "get a closer look".
Failing to hide his anxiety, fellow host Richard Arnold said: "I'm a bag of nerves now Laura."
As she tried to remove the comic from the display board it tore in half and Laura shrieked: "Oh my goodness! Is this the original one that's worth £150,000?
Completely unaware of the joke, a shocked Richard threw his hand to his face and said: "We are making this up, right?"
Meanwhile, newsreader Ranvir Singh grimaced: "We've probably got some insurance that covers this."
While a panicked, Charlotte Hawkins looked around the studio and said: "Can we just glue that back down again? Can we go to an advert?"
Clearly pleased that she had managed to fool her colleagues, Laura finally revealed: "Guys - it was a joke! It's not really worth £150,000, it's worth nothing!"
She then took much delight in tearing the rest of the picture into tiny pieces.
Laura later took to Twitter and shared a picture of what the poster looks like now and wrote: "Ha-I'm expecting my #oscar in the post for that performance! Ripping 'a rare, unseen & expensive' character' The @gmb faces were priceless!".
Vowing to get his own back Richard replied with a picture of cartoon baddie Hooded Claw and a tied-up Penelope Pitstop, writing: ".@GMB @Lauratobin1 My revenge will be diabolical #FridayFeeling."
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