When the Inspector comes to visit Dr. Frankenstein they play a game of darts. On Fredick's second turn he throws two of the darts out the window. When the Inspector is leaving he has several darts in his car tires. There are many more than the two.
Yes, that's true...but I also noticed that the when the inspector sticks in his darts by hand, they are a little bit spaced apart. When he goes to take them out, they are tightly clumped together.