and I can confirm that indeed…ice is cold.
Some tips:
Do not sit while someone is pouring ice water on you. The ice just sort of hangs there. If you stand it drops off.
Have it done quickly–poured over your head is best–NOT a slow long pour on the back of the neck that NEVER seems to end.
Do not make a jerk of your wife while pouring ice on her head or you WILL be called out on a challenge.
These are things I’ve learned first hand.
"Reality is that which, when you stop believing in it, doesn't go away. " Philip K. Dick