What do you call tree sap that won't stop running?

Forest gunk.

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Stop Jokes More Stop Jokes

Where do ghost trains stop?

At devil crossings.

Why would a blonde wear green lipstick?

A.) Because red means Stop.

Run Jokes More Run Jokes

Why is it not safe to doze on trains?

Because they run over sleepers.

Why would Superman have won any race he ran against Roy Roger's dog?

Because he was faster than a speeding Bullet ...

Tree Sap Jokes More Tree Sap Jokes

What is something you can use to find the pH of tree sap?

A log!

What do you call tree sap that won't stop running?

Forest gunk.