A group of volunteer firefighters was then drafted in to help and used their tools to prop up the drainage cover for easier access.
Afterwards, the fat rat was returned to the sewer where, if Disney-owned cartoons have taught me anything, it either went off to pursue its dreams of becoming a world-famous chef or got its evil plans thwarted by a great mouse detective.
It reportedly took Sehr and the firefighters just three minutes to rescue the rat.
With the help of a full team of firefighters, the manhole cover was lifted and propped on wedges while Mr Sehr managed to pop the rotund rat free. The call, which came from an unidentified person, said he/she saw a rat stuck at the crate while getting out of the sewer. That's when things get surreal.
One resident Juliana told German newspaper BILD that her and her husband had at first tried to liberate the animal themselves before calling the fire brigade.
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Ask yourself that question. "Everyone without exception should respect this, including the United States", he said. We will find every last dollar they have stolen and return that money to the Venezuelan people", he said.
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An animal rescuer with the "Berufstierrettung Rhein Neckar" made an unsuccessful attempt to free the distressed rodent, but ended up calling for backup from the local volunteer fire department in Auerbach, located some 30 kilometers (19 miles) north of Mannheim.
Animal rescuer Michael Sehr told news agency DPA that he didn't see a contradiction with saving the rat in Bensheim.
The internet, as expected, has fallen hard for the portly pest, with Twitter users declaring "We are all fat rat". More than you might think. Once the rodent was free, it hurriedly got back inside the sewer.
"Even animals that are hated by many people deserve respect", Mr Sehr added.