High up in the mountain of the narrow gauge railway stood a big boulder.It had been sitting there for a long time.Rusty and Smolder were helping at the quarry.At the sheds,They meet Twilight,Thomas,Spike,And Percy.

“Where’s all this rock coming from?”Percy asked.

“The new quarry.Thats what.”Said Smolder.

“These rocks will be pretty useful.Although,It’s dangerous.”Said Rusty.

“Why?”Twilight asked.

“Because of a big boulder.”Whispered Rusty.”I think it’s watching me.”

“Boulders don’t have eyes.”Said Thomas confused.

“Well,Theres something really strange about this one.”Said Smolder.Just then,Edward and Applejack arrived with a new digging machine.

“Who’s this?”Spike asked.

“His name is thumper.”Said Edward.

“He’ll help us collect the rock faster.”Said Applejack.Soon,Thumper was digging hard.The Workman were pleased.But,No one bothered to check the boulder.Later,It started to rain and the workman went home.Rusty and Smolder were ready to go.But,Rusty gazed up and shivered.Above stood boulder.Suddenly,A large slab of rock landed on the tracks.Rusty and Smolder were shocked.

“I think it’s best if we leave.”Said Smolder scared.”Maybe the rain loosened some of this rock.”

“I think it’s the boulder wanting us to go away.”Shivered Rusty as he and Smolder left.The next day,Rusty,Smolder,And the workman were back.Thumper was digging harder than ever.Suddenly,Rusty noticed something.

“The boulders moving!”He gasped.

“Don’t be silly.”Said Smolder.”It can’t.”But,It did and obit slammed onto Rusty’s track bouncing Rusty and Smolder off the ground.Then,Boulder started rolling.”I guess I take it back!”Smolders ran not Rusty’s cab and they raced away as fast as they could.Then,They stopped at a junction.

“Phew!We’ll wait here until the boulder passes by.”Panted Rusty.But,Boulder was nowhere to be seen.Suddenly,They heard the crashing sound of Boulder smashing through freight cars behind them!

“Oh no!Its behind us!”Cried Smolder.Rusty started rolling forwards.Just then,They saw another junction.One line went up hill.Rusty switched tracks and Boulder thundered past.Meanwhile,Sandbar and Skarloey were making their way up to the quarry with some building supplies.Then,They saw Boulder rolling towards them!

“Yikes!”They Cried as they raced backwards.Boulder was catching up fast.But,They raced into a siding and biffed into the buffers.Skarloey tumbled off the tracks as Boulder rolled by.

“That was close.”Panted Skarloey.

“We must warn the yards!”Shouted Sandbar.

“I don’t think we have much time!”Called Rusty.Boulder rounded a bend and there ahead was Silverstream and Rheneas.

“It’s running loose!”Yelled Rheneas.Silverstream drove him back as fast as she could.

“Come on!Come on!Come on!”Cried Silverstream worried.Rheneas swerved into a siding and into a pile of ballast as Boulder rolled by.

”Its better for a smash than a squash.”Panted Rheneas.At the yards,Percy and Thomas were collecting trucks of dynamite from the sheds.Then,They saw boulder rolling to the shed.

“Oh no!Its heading straight for us!”Cried Twilght.

“Run for your lives!”Cried Spike.But,It was too late!Boulder knocked Thomas,Percy,And the trucks off the track and smashed into the sheds.As the dynamite blew up,Fire and smoke exploded everywhere!Everyone was covered in black soot.Luckily,No one was hurt.But,The sheds were destroyed.When Sir Tophom Hatt inspected the destruction,He decided to close the mine.Then,He looked at Boulder.

“We should have left this part of the island alone.”He said.The workman moved boulder to a hill where he would never come loose again.