It seemed like a Cold War episode. A T-90, one of Russia's most advanced battle tanks, was hit by a US-made "tank killer" - a tube-launched, wire-guided BGM-71 TOW missile.
The tank withstood a lightning-like explosion without igniting, and one of the crewmembers hastily got out of the turret.
The episode may have pitted weapons produced by Cold-War rivals, but the scene took place in Aleppo in February. The tank was operated by Syrian government forces, and the TOW was launched by Hawks Mountain Brigade, an opposition group that got the TOW via Saudi Arabia or directly from the CIA, a military analyst said.
The whole episode was "a chance to see what happens when state-of-the-art hardware from two major world powers violently collide in the Middle East", Robert Beckhusen wrote for the National Interest magazine. 
It was also a perfect commercial for Russian arms producers. 
The Kremlin said it spent almost $500m on its military operation in Syria that started on September 30 and goes on despite a widely advertised partial withdrawal last month. But Moscow could earn a lot more after the world saw Russia-made weapons, old and new, battle-tested by the Russian air force and Syrian President Bashar al-Assad's military on the ground.
"This is colossal advertising and Russia expects new purchases worth tens of billions of dollars," Alexander Markov, political analyst and member of Russia's Council on Foreign and Defense Politics, told Al Jazeera. 
"Hundreds of experts from arms producing [companies] have been there, and they tested their systems in battle conditions."
Show off the goods
The Syrian war has helped Moscow boost its status as a major arms producer and exporter, already the world's second-largest after the United States. 
And that's good news for President Vladimir Putin amid a deepening economic crisis caused by low oil prices, the falling rouble, and Western sanctions imposed over Russia's actions in Ukraine.
The Syrian operation provided an "excellent opportunity to show off the goods", Ruslan Pukhov, director of the Moscow-based Center for Analysis of Strategies and Technologies, told Al Jazeera. 
The operation provided a chance to battle-test "all the last-generation military systems that Russia could not test in military condition - high-precision weaponry, missiles, helicopters, planes and cruise missiles", he said.
The Kommersant daily said last week, quoting Kremlin insiders and military analysts, that the "marketing effect" of the Syrian conflict will boost Russia's arms sales by up to $7bn.  
Algeria has bought a dozen Sukhoi Su-32 fighter bombers, an export version of the Su-34 that proved lethally effective in Syria. The new aircraft will replace Algiers' aging fleet of Russian-made MiG-25s.
Shift in preferences
Pakistan, Vietnam, Indonesia and a string of Latin American nations are also eager to buy more bombers and helicopters, but they also want more than just aircraft, a backbone of Russia's arms exports since the 1991 Soviet Union collapse.
Their focus shifted to Russian jamming communication stations, S-400 missiles, tanks, air-defence systems, small arms, and even submarines that have been battle-tested in Syria.  
"The system of preferences has changed," defense analyst Anatoly Tsiganok told Al Jazeera.
Even NATO member states such as Greece show cautious interest in Russian arms, he said. 
The sales figures already reflect the change.
In 2015, Russian arms exports hit a record $14.5bn because of their "reliability and high effectiveness", President Putin said in late March. The figure was higher than expected, and foreign orders for Russian weapons exceeded $56bn, Putin added, addressing a meeting of defence officials.
In an apparent attempt to impress the West and the rest of the world - and appease Putin - Russia's defence ministry showed off some sophisticated weapons that are not for sale, and whose use in Syria did not seem necessary.