Russia's new Armata tank, which is set to officially debut in Moscow for the Victory Day parade on Saturday, appears to have broken down during a dress rehearsal on Thursday, according to reports from Russian media and a video of the parade from RuptlyTV.

Here's how it looked:

The rest of the parade continued while the Armata sat motionless. It appeared to be attached to a vehicle in front by a cord. Here it is from a little farther out:

The tank has been touted as one of the most impressive pieces of military hardware ever produced by Russia, with technical specifications that suggest it could survive an attack from an Apache attack helicopter.

Some analysts even think the Armata will surpass all existing Western models — at least when it is fully functioning.