can you tell me what this transition fx made of?

[samsome]

from 4 to 5 seconds...

it starts with some kind of noise on right channel and going to some percussion on the left channel

if you can describe it in more detail please, if you can understand whats going on better

thank you

[Joerg]

for the first part just take filtered white noise (eg Thor) so it is not too bright and fade it in the last count of previous measure. Concenate that with a very reverby clap just on count one. You can pan both parts to opposite sides as in the video.