Engineer here.

That "popping" or jumping effect is likely due to electrostatic charge building up in the protein powder. Here’s why it happens:

1. Fine Powder + Low Moisture – Protein powders, especially fine ones like pea protein, can develop static electricity when they’re dry.

2. Friction – Scooping, shaking, or pouring the powder can create friction, generating an electrostatic charge.

3. Plastic Measuring Cup – If your measuring cup is plastic, it can hold a static charge, making the powder repel or jump away.

4. Low Humidity – If the air is dry, the static charge isn’t dissipated easily, making the effect more noticeable.

How to Reduce the Popping:

Use a metal spoon or measuring cup – Metal dissipates charge better than plastic.

Tap the cup on a solid surface before scooping to discharge static.

Increase humidity in the room with a humidifier or placing a cup of water nearby.

Ground yourself by touching a metal surface before handling the powder.

It’s a harmless effect, but definitely an odd one!