Praying mantis playing the air drums, with slow motion

This praying mantis was making some attention-grabbing movements with its front arms, similar to playing drums. Here are video clips of the mantis in real time, 1/2 speed, and 1/4 speed.

Does anyone have an idea of what the mantis is doing? Is this a mating display?

Видео Praying mantis playing the air drums, with slow motion канала duncantakeru