Ok, here
image explosion2 = BasicSheetAnim("images/explosion.png", 8, 6, [0.04]*48, loop=False)
#explosion sprite from here. https://github.com/Foxcapades/renpy-spritesheet-animation
label start:
"What's this?"
show explosion2:
zoom 3.0
xcenter 0.5
ycenter 0.5
"Explosion example!"
"Waiting for end animation!.."
"Even revisit it's not playing again..."
return