I-Screamer is a character in Monster Truck Mater.
Monster Truck Mater
I-Screamer is a ice cream monster truck who was Mater's first opponent. He was defeated when Mater posed as a child and asked for a double dipped, dipstick sundae, then when I-Screamer's back was turned, Mater used his tow hook to flip him over. To add insult to injury, Mater sprayed the entire contents of a fire extinguisher onto him, and topped it off with the empty extinguisher.