THAT is how you properly do a jam with multiples of the same instrument. Normally, the singer, or the person who chooses the song, will point to each musician in turn, to take a break. EVERYONE who wants one, gets to take one, and the others respectfully back their volume down. No one selfishly drowns out the person taking their break. If someone is on the outside and they move toward the group for their break, the others part like the Red Sea and let them in, not blocking them! Well done folks. Bluegrass people are good people, and this courteous display makes me proud that people around the world, associate this music with our great country.
Always impressed with mandolin and fiddle. Those folks know what the heck they are doing. Guitar and banjo pickers just capo up and do the same thing they always do.