Have some long, poetic descriptions of explosions ready.
The speeder bike careens into the tree and blossoms slowly into an expanding rosette of flames and sparks, accompanied by the air-crushing rumpling noise of tortured metal rupturing and oxidising instantly in the building conflagration, reaching a crescendo of orange brilliance that briefly outshines the sun as the fuel is voraciously consumed by the destruction.
Slowing down the action is a great chance to show off your composition and elocution skills!
Transcript
{Luke fires}
[SFX]: Pow! Pow! Pow!
{Trooper 3 explodes}
[SFX]: KABOOOOOOMMM!!!!
Luke: Just like chasing womp rats. Except with trees.
Trooper 4: I told you it was dangerous!!