Nari bombs, by the name alone, sound quite scary, but it all depends on how it was made. Sure, they can be made to explode violently when in direct contact with water, which makes them great for traps or just chucking at your enemy while someone else lungs a water ball, but most nari bombs being sold are tamed so that they only emit a lot of smoke instead.
Still, don’t drop it in a lake, as there’s only so much safety against dumb people a manufacturer can do—use Create Mist instead, you dumbhead! Well, unless you’re trying to see how cool the explosion looks because it’s a sight to behold. Actually, here’s a trick! Wrap it in paper so that the explosion is delayed a bit! That way, the water's top will explode out much more intensely! You didn’t hear it from me though.
Adventurers had a variety of colors they used, sometimes varying per region or per guild too. It created a lot of confusion to the point Forway intervened and officialized these colors:
Red: Help.
Cyan: Conquered/Complete.
Green: Safe/Go ahead.
Yellow: Retreat.
These colors are used by everyday folks too, and even more so by adventures. However, Bandits are people too, so they use it to get you into a trap instead. Be wary if you see it randomly, but remember as an adventurer you’re representing Forway! You should still check it, though as it could be a test for your promotion. You never know! If anything, you can kill a few miscreants and loot them instead—to surrender it all to Forway for investigations. Yes! Exactly that ;)