Caterpillar attack!

Ah, what a great day today. Kind of relaxing. I think i really rarely get free Saturdays nowadays. Watching TV on a Saturday, going online... and as i was looking outside my house, i saw some long, black, thick, bold lines on my balsam plant and thought, 'What is that?' Then i went out to see what it was. Looking closer i realized that it was not one, not two but three caterpillars!!! Where did it come from, and why the balsam plant! Anywayz, watched it some time, came back later, watched it and watched it. Slowly it was eating the leaves and stem. My plant was being eaten ALIVE!!! Then in the afternoon i went to throw the caterpillars away, one squirted something brown out, dunno what was that. Then i threw it into the drain. When i went outside again later, i saw that th caterpillar was out of the drain! Now what? Attack the mango tree? Didn't want to kill it cause i pity them. Maybe they could turn into butterflies. Or moths? Not sure. It seems you can never tell. Gotta check up on caterpillars. Well, the rest of the day was fine. Nothing much. Went to 1u at night. Met an old ex-schoolmate. Bought something after comparing and thinking hardly. Went browsing around. That about it. Didn't go to librarian installation, though some people asked me to go.