Fleas are capable of jumping extremely high. In fact, the average flea can jump between 8–10 inches high, which is just about 100 times its height. That’s like a 5-foot-tall person jumping from the ground to the top of the Washington Monument. Yikes.
Fleas can be trained, however.
If you were to place a group of fleas in a jar with the lid off, their superior jumping ability would easily allow them to escape from the confines of the jar.
Now, close the lid and walk away for three days.
