Message effects in iMessage lets you add a touch of flair to other bland communications. With the feature, you can compliment a birthday wish with a stream of balloons, send a congratulatory text along with a shower of confetti, or make the chat bubble slam itself in the thread. If you're on the receiving end, however, they may jarring.
According to Apple, there is some degree of motion sensibility, which usually applies to car rides and boat trips.
If you are one of those users, you can disable message effects from playing in messages without your approval.
The process differs depending on which iOS version you are using 're running. If you're running iOS 1
Method 1: Disable iMessage Screen Effects in iOS 13  Open the Settings app, then go to Accessibility -> Motion. There, "Auto-Play Message Effects." Toggle that off, and messages effects, whether they are bubble effects or screen effects, should not play right away.
Open the Settings app, then go to General -> Accessibility -> Reduce Motion. Next, make sure "Reduce Motion" is toggled on, then disable the toggle for "Auto-Play Message Effects" underneath it. How to Disable Message Effects from Auto-Playing on Your iPhone ” width=”532″ height=”532″ style=”max-width:532px;height:auto;”/>