Uhmm, isn't so simple. I knew the player receiving Lava Golem on his side of the field could activate Bottomles Trap Hole, but, reading this ruling, looks like this is a summon in common!
The ruling is:
You can Special Summon "Lava Golem" onto your opponent's side of the field and then use "Bottomless Trap Hole" to destroy it (sending 2 of your opponent's monsters to the Graveyard and giving him nothing in return).
Anybody else?