Answer to #143: Jack should use the shovel to make a pile of dirt under the window, climb on it, and escape from his cell.
(Dedicated to Wolfpowers2151)

A serial killer kidnapped people and made them take 1 of 2 pills: one was harmless, and the other was poisonous. Whichever pill a victim took, the serial killer took the other one. The victim took their pill with water and died. The killer survived.
How did the killer always get the harmless pill? [Slide for answer]