A maniac was busted Friday for randomly shoving a 64-year-old painter onto the subway tracks in Queens, leaving him “bathed” in his own blood.

Terrell Jarrett, 37, is facing charges of attempted murder, assault and reckless endangerment for allegedly pushing Orlando Cabrera onto the railbed at the Parsons Boulevard “F” train station on May 31, cops said.

Cabrera, 64, was waiting for a southbound F train around 5:30 a.m. to head to work when Jarrett allegedly muttered “Get out!” before launching the attack.

“This big guy had snuck up behind me and took me by surprise,” Cabrera told The Post in a Spanish-language interview shorty after the attack.

The victim sustained cuts to his arms and head.

“I was bathed in my own blood after what happened. Thank God two officers were on the train to help me and get the ambulance,” he had said.

Jarrett has six priors for criminal trespassing and possession of a controlled substance, all within the last two years. 

He was collared at a Jamaica Dunkin’ Donuts that he frequents, police sources said.

The brute was most recently cuffed last January at the Broadway Junction station in Brooklyn, where officers found him sprawled out in possession of a crack pipe.

Cabrera said the attack left him a “nervous wreck” and that he couldn’t imagine “going after someone without a reason, without a motive.”