Carly convinces him to help her pull one "safe" prank on Sam and Freddie. The success of the prank triggers Spencer’s old addiction, leading him to prank everyone in sight—including an old lady's onion ring.
Carly asks Spencer for help, but he is initially terrified. [S4E3] iGet Pranky
To stop him, the gang tracks down his original garlic powder victims. The former classmates confront and beat up Spencer, effectively "scaring" the prankster out of him. 🎭 Cast & Crew Carly convinces him to help her pull one
"iCarly" iGet Pranky (TV Episode 2010) - Full cast & crew - IMDb [S4E3] iGet Pranky
He was once the "King of Pranks" in junior high until a prank involving 200 lbs of garlic powder accidentally injured his classmates.