Tyreek Hill‘s letting his detainment fuel his competitive fire … putting his hands behind his back after scoring his 80-yard touchdown during Sunday’s game.

The wide receiver — who was detained by police just hours before his Week 1 matchup against the Jacksonville Jaguars — just scored a huge TD … and, fans filmed his reaction in the endzone.

After scoring, Tyreek turned toward the crowd and put his hands behind his back … micmicking the position cops put him in this morning.

Watch the video … the WR walks right in front of the Dolphins supporters making sure they see his posture — and, they go absolutely crazy for their star receiver.

As we told you … TH was pulled over this morning by local officers — and, somehow ended up face down in the street with his hands cuffed behind him before cops sat him on the curb.

The Dolphins put out a statement … saying Hill was pulled over for a traffic incident and briefly detained. Further details have not come out yet.

Stephanie V. Daniels — director of the Miami-Dade Police Department — says they are reviewing details of the incident and body cam footage.