I don’t think anyone has noted on the timing between UncleTello dying and Leo realising it
When Casey arrives it’s either right before or a little after Donnie dies, when Donnie is crawling to the mech
The turtle pile is still untouched
And when Casey races to him and takes Donnie to the future, the pile is still untouched
When Donnie dies, there are some particles which imply he’s still around
It’s only after the particles dissipate- after Donnie leaves with Casey- that Leo realises that Donnie is gone and freaks out
Which, with this context, explains why Leo is so shaken up by Donnie’s death and why he’s so filled when Donnie brings him back
The constant hum of the twin sense hes lived with all his life suddenly gone and he’s left in eerie silence
It also possibly explains why he feels turbulent when the group is sent back to the past- the silence returns and his everything is telling him he’s lost Donnie again but Donnie is with him this time, via programming shenanigans
(Also also this might add to younger leo’s anxiety)
Love everything you do, hope life’s treating you well <<333

















