Brain Test 4 Level 28: Doctor Worry needs to get blood samples from that fly.
Brain Test 4 Level 28
Screenshots

Quick Answer
Drag the fly to the doctor's face to let it suck blood. Use the fly swatter from the shelf to smash the bloated fly, then drag the doctor's flask to the blood puddle.
Skills Tested
Step-by-Step Solution
- 1) Drag the fly to the doctor face so it drinks blood.
- 2) Take the fly swatter from the shelf.
- 3) Smash the now swollen fly.
- 4) Move the doctor flask to the blood puddle.
Hint
Reveal a hint
First let the fly drink, then crush it, and finally soak up the blood.
Why It Works
The level chains several steps together. Feeding the fly, smashing it, and then using the flask on the spilled blood is how the sample is finally gathered.
Frequently asked questions
How do I solve Brain Test 4 Level 28?
Drag the fly to the doctor face so it sucks blood, smash the bloated fly with the swatter from the shelf, then drag the doctor flask to the blood puddle.
What is the answer to Brain Test 4 Level 28?
The solution is to let the fly drink from his face, crush it with the swatter, and collect the blood with the flask.
What is the trick in Brain Test 4 Level 28?
The fly must first drink blood so it becomes bloated, then you smash it and use the flask to gather the spilled blood.
Why do I need to smash the fly in Brain Test 4 Level 28?
Smashing releases the blood the fly drank, so the doctor can then collect it with his flask to get the sample.
Is there a video walkthrough for Brain Test 4 Level 28?
Yes. The embedded video shows feeding the fly, smashing it with the swatter, and collecting the blood with the flask.
How do I avoid getting stuck in Brain Test 4 Level 28?
Follow the order: let the fly drink first, then smash it, and finally bring the flask to the blood that spilled.