Boy: "- What is the Perestroika ?"
Grand-Father: "- You see these two buckets of coal? One is full and the
other one is empty."
B: " - Yes."
GF: " - Well... (he walks to the buckets and drop the coal from the full
bucket into the empty one)... This is the Perestroika."
B: " - But, this is the same thing."
GF: " - Yes, but did you hear the noise ?!"