They should bring high school biology students to study the subway and Darwin at the rate that people are dying out there.

A Bronx deejay who busted out beats under the name “Tech Trackz” died on a stretch of city subway tracks Saturday morning as he tried to retrieve an iPhone he had dropped, officials said.

Police sources said Francisco Diego Jr., 22, was shocked and then hit by a No. 2 train at the Wakefield-241st St. station — the last stop on the line — just after 1 a.m.

Sources said Diego told a token booth clerk he had dropped his smart phone on the tracks. After the train entered the station he managed to get between two train cars and jumped onto the tracks. He was electrocuted when he touched the third rail, sources said.

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Diego fell onto the tracks, where the train hit him as it rumbled out of the station to be serviced.

Bronx DJ Tech Trackz dropped his iPhone on the subway tracks early morning and couldn't wait for workers to help him retrieve it.

Bronx DJ Tech Trackz dropped his iPhone on the subway tracks early morning and couldn’t wait for workers to help him retrieve it.

Paramedics rushed the tragically injured Diego to Jacobi Medical Center, but he could not be saved.

The always-smiling spin master had just worked a Memorial Day bash at Maximo’s Place, a Bronx nightclub where he often hosted dance parties, according to his Facebook page.

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His grief-stricken mother choked back tears as she declined to talk about her son.

Heartbroken friends stood outside Diego’s Fox St. home, where a makeshift memorial had been erected. They were in disbelief that Tech Trackz would do something so risky for something so replaceable.

Francisco Diego Jr. tried to jump down between two cars to grab his iPhone, but was shocked by third rail then hit by No. 2 train.

Boris Kaykov

Francisco Diego Jr. tried to jump down between two cars to grab his iPhone, but was shocked by third rail then hit by No. 2 train.

“He’s not the type to jump into the subway to get it,” said friend Kevin Atterbury, 16. “He would just go get a new one. That’s why this is so shocking.”

Read more: http://www.nydailynews.com/new-york/bronx/bronx-dj-killed-2-train-jumping-iphone-article-1.1360986#ixzz2YYrM4uaC