Examples of pyrokinesis

Someone causes a huge fire and train wreck.
(Genesis)

In 1992, a fire starts in Meredith's apartment, allowing her to escape Mr. Bennet and Claude.
(Hell's Angel)

In present-day, Meredith creates fire from her fingers to light a cigarette.
(The Fix)

Meredith shows her daughter her capabilities...

...by making a small fireball in her hand.
(Distractions)

Meredith holds her hand over a stove to ignite a burner.
(Run!)

Sometime after November 8, 2007, while battling a team of evolved humans, Peter ignites his hands.
(Walls, Part 2)

In 2011, Sylar and Peter face off. In a creative mirroring of old western movies, Sylar's hands turn to ice at his will, where Peter's ignite flame.
(Five Years Gone)

In 1989, Maarten ignites his hands.

He traps the "liquid man" by engulfing him in flames...

...or by shooting precise beams of fire.
(Team Building Exercise)

Flint tries to escape from Level 5 by burning the glass.
(The Second Coming)

Flint burns an innocent bystander on the street with his ability.
(The Butterfly Effect)

Flint keeps his fires burning for fun.
(The Butterfly Effect)

Meredith shows her ability.
(The Butterfly Effect)

Meredith tries to light her Cigarette.
(One of Us, One of Them)

Flint threatens hostages at the bank.
(One of Us, One of Them)

Flint attacks Peter, in Jesse's body.
(One of Us, One of Them)

Meredith uses fire...

...to heat a shipping container, burning the oxygen...

...and suffocating Claire.
(One of Us, One of Them)

Flint attempts to take on Noah and Sylar.
(One of Us, One of Them)

Peter cautiously enters Sylar's home in Costa Verde.
(I Am Become Death)

Meredith warns Sandra to stay away from Eric Doyle.
(Angels and Monsters)

Flint prepares to attack Peter.
(Dying of the Light)

Flint uses his power on some popcorn packets, causing them to pop.
(Villains)

A fire extinguisher's chemicals...

...sprayed on Flint's hands extinguish his fire.

Meredith throws a fireball at Thompson.
(Villains)

Mr. Thompson figures out how to retard Meredith's flames.

Meredith uses her ability to produce flame to fight Danny Pine...

...burning his metal hand.
(Villains)

Flint uses his ability against Thompson.
(Villains)

In 1982, Meredith starts a fire...

...that burns down her childhood home.
(Playing with Fire)

She burns four of her nine group homes down.
(Playing with Fire)

Meredith takes up smoking.
(Playing with Fire)

In 1989, Flint shows Meredith how he can "make it extra hot".
(Playing with Fire)

Flint throws fire at Peter...

...igniting leaking gas. (It's Coming)

Meredith uses her ability to ignite a molotov cocktail, and hurl it at Danny Pine.
(Partners)

Iris demonstrates her ability to Santiago and Elisa.
(Destiny, Part 4)

Meredith uses her ability to weaken the glass of a Level 5 cell.
(Dual)