It looks like a splice combined with thick linear emulsion scratches but the emulsion also seems to be peeling away. Really we're lucky to have such an early treasure in any condition.
More beauty within loss.
With a running jump, our hero grabs onto an overhanging bar and spins himself upwards onto the next floor.
How sad that the one piece of stunt work in Street Angel is nearly lost to deterioration.
How lucky we are to experience it with the glow of disintegration that gives the feat an other-worldly quality: