It was a series of memories. Layered one after another in a heavy blanket of loss.
A shriek of metal grazing against metal, accented by panicked curses. Glass shattered and sprayed in a diamond-like mist; momentarily frozen and lovely before time started moving again. The shock was worse than the impact, at first. Until the first surge of blinding pain shot from crushed bones and ended a life. Vision gave way to grey haze and the last thing seen was a bloody mess, ruined and unrecognizable.
When vision returns there is glass again. Transparent barriers intended to divide the ruined from the whole. Looking out through that glass is better than risking a glimpse of the gauze that covered the ruination that was recognizable now as something vaguely functional. Sleep takes over only when the pain makes it impossible to refuse the drip-drip of oblivion.
Oblivion is welcome--it's the waking up that brings the loss into focus. Each time eyes open and thought resumes, there is a moment of silence before the sound of twisting metal and fracturing glass gives way to the music of despair.
The memories fade. Smothering themselves out of existence under the weight of regret.