So...word of advice to fellow Slytherins...unless you really enjoy scrubbing all the trophies in the trophy room without magic, do not:
1) Sneak a batch of gillyweed out of the greenhouse.
2) Feed it to a gaggle of gullible firsties, telling them it's a "special wizard delicacy"
3) Yell, "Oh Merlin, no! Run, run for your lives! It's coming right at us! Into the lake, we'll be safe, it can't swim!" and chase them toward the water when you didn't actually see a thing.
4) Laugh so hard you swear you will need skele-gro for the three ribs you cracked because you never saw anything so funny in your whole life.
p.s. I swear I had more of a sense of humor at 11. And I did have a drying charm and some pepper-up ready, so no harm no foul, right?
p.p.s. That Ravenclaw was totally exaggerating...the Squid barely touched him. It definitely did not "grab him" and "nearly squeeze the life out of him".
p.p.p.s. And I totally do not believe he knows mermish.
p.p.p.p.s. On the other hand, I didn't think he knew words like that either. I wonder if the soaping hex has worn off his mouth yet?