The effect of the explosion is a formula:

• Add 0-99 to OCB for delay (quarter seconds)
• Add 100-900 to OCB for size (1-9)
• Add 400 to make the explosion deadly.
• Add 10000 to OCB for green explosion.
• Add 1000 to OCB for blast wave ( 0 or 1)

The explosion object itself is not rendered in-game. The video included uses OCB 1400.