Tremoring Trumpet

violins: they do this dramatic swaying thing and sometimes the performers' faces look like they caught a whiff of something that isn't good or bad but it's iffy as hell

violas: they drop their instrument real low, like almost so that the scroll is hitting their knee, and they almost hop out of their chairs. it's kind of intimidating

cellos: classic cello headbang

basses: that head thing djs at discos do

oboe: my god they're like the violins on steroids. they move all over the place and their expression just becomes more and more pained as their solo goes on. don't even get me STARTED on the eyebrows

clarinet: like the oboe but slightly more chilled out

flute: they lean forward and bob their heads as they AGGRESSIVELY spit into their instruments

bassoon: sometimes they close their eyes and start kind of dancing really passionately with their instrument and it's kind of uncomfortable to watch

the entire brass section: they sit fairly still compared to the other instruments, but they're still guilty of excessive eyebrow raising and lots of disapproving squints as they realize they're playing out of tune and everybody heard it

percussion: they get really excited before they get to play their one note like they'll hop around and start dancing and bobbing their head before their triangle part and it's adorable

piano: headbanging, head bobbing, swaying, pained expression (usually no eyebrow raises, though), and they sometimes drop their heads so that it looks like they're sniffing the keys