A boy overcoming cancer was surprised by the turnout for his fourth birthday.

Whitaker Weinburger loves the "Transformers" character Bumblebee. He thinks every yellow vehicle he sees is the robot superhero, WJLA reported.

So, after overcoming stage 4 neuroblastoma earlier this year, Whitaker’s parents planned a party like no other.

"We hope to see our street teeming with yellow cars on Whitaker's birthday, and can't wait to see his joy and surprise," his parents wrote on social media, WJLA reported.

On Wednesday, their street was filled with about 200 yellow vehicles, including cars, trucks, buses and fire apparatus.

"Bumblebee. Bumblebee. Bumblebee," Whitaker said in delight. "I want to keep all of them."

His mother was overwhelmed by the response.

"This is crazy," Erin Weinburger told WJLA. "This is absolutely crazy. It's amazing. I can't believe how great this is. I can't believe how many people showed up, such an insanely great community we live in."