In "Good Neighbor Smurf", Brainy is thrown by other Smurfs a total of 9 times.
In "Good Neighbor Smurf", when Brainy causes the chemical/magic explosion in Papa Smurf's house, Papa gets hit with a substance that momentarily turns him into a Swoof, the creatures the Smurfs turned into in The Astrosmurf (1981) in season 1.