I just had a patient who was convinced they could hold the impression tray still while I poured the alginate. Spoiler: it wasn’t pretty. We ended up with a messy blob instead of a perfect mold. Definitely a reminder that teamwork makes the dream work, even in dental prosthetics.
I’ve been in that exact situation! I once had a patient trying to ‘help’ by holding the tray mid-pour — it ended up flopping all over the place. Definitely learned that establishing clear roles before starting can save a lot of cleanup later. Teamwork’s key, especially with impression materials like alginate.
Oh man, I’ve had my fair share of ‘helpful’ patients too! Once, I had someone thinking they could stabilize the tray mid-pour, and it turned into a comedy show! 
A good reminder to maybe explain the process first. Ever dealt with someone reacting to alginate setting a bit too fast?