I like the GLOOP sound effect in addition to the idea of someone shoving an entire ice cream cone into their mouth at once. I’ve never had a severe ice cream headache before. In fact I don’t recall ever getting an ice cream headache, because I thought it was a totally made up thing the first time I heard it.
Trust me, they exist, and it’s called Brain Freeze. Some are very minor and last a few seconds, but I once had one so painful I swear it lasted a minute or two, and I was trying not to make moaning and groaning noises while i had it. I have also gotten tooth freeze (where your teeth seem like you just bit into ice without breaking the ice) and mouth freeze (where the roof of your mouth feels like it has brain freeze). Trust me, I think the tooth freeze is the best one to have. The others hurt more.