The Hero Call is a spectacular showpiece move in the arsenal of a poker player.
Just like a goalkeeper deflecting an unsaveable ball in football, poker players can save a hand from a hopeless-looking situation by simply calling.
You don't always need a monster to invest your entire stack. A second or third pair - or sometimes even just ace-high - is enough to expose an expensive bluff from your opponent.
When you get it right in a big hand, there's no bigger or better feeling in poker.
Here are five pretty spectacular - and instructive - Hero Calls in video form, picked out by PokerOlymp's Arved Klöhn.
5 Incredible Poker Hero Calls
1) Davidi Kitai: Ace High and a Raise on the River
Belgian Davidi Kitai, Triple-Crown winner and EPT Berlin champ, is one of Europe's most successful poker players ever. He can read his opponents like few other players in the game and this hand against Andrew Chen shows it.
Heads-up at EPT Berlin in 2012 Chen puts in a bluff on the river that Kitai somehow picks off:
2) Yevgeniy Timoshenko and a Very Shaky Top Pair
This hand comes from the 2013 WSOP Main Event where Yevgeniy Timoshenko and Vimy Ha got involved in a giant hand on Day 4.
Here Ha put his foot on the gas with a bet and very credible reraise on the turn. Ha then fired another bullet on the river.
Timoshenko has top pair on the dangerous-looking board but somehow, despite (or maybe because of) the chip pump fake, exposes the bluff:
3) David "Devilfish" Ulliott is in Bad Shape
Hero calls, of course, don't always work out.
At the 2011 Party Poker Premier League, David "Devilfish" Ulliott somehow got duped into a very bad call by the banter of Sam Trickett.
Given that Trickett has him completely dominated you can't have a Hero Call go much worse:
4) Luke Schwartz, the Calling Station
Luke Schwartz certainly has a reputation for being a pugnacious character. But he is a very good player on a good day, of that there's no doubt.
In this final hand on Late Night Poker against Roberto Romanello Schwartz ends up with a very shaky second pair on the river. Romanello has put the pressure on for the whole hand and finally shoves the river.
Schwartz then works his way through his Calling Station image and figures Romanello would never bluff here. But then Romanello also knows that he's never bluffining here.
So the question is: Who's levelling who? And who believes that the other believes that he does not believe him, because he had previously never believed him? In the end, Schwartz levels best:
5) Kenny Tran is The Best
For this one we dive even further into poker history to the 2007 WSOP Main Event.
Here we see Kenny Tran facing a mind-bogglingly dangerous-looking board with four hearts and just A-8 in his hand.
His opponent leaves hardly a doubt that he has at least a flush, but Tran sees through the game and demonstrates his Hero Call heart once again: