As a muggle born, I guarantee this would happen.

ME

By the end of the class, the Muggleborns have summoned 5 Pokemon, 2 Digimon, and one furry.

My patronus is probably PURE EVIL!

*summons an actual robin*

Or a muggle born pulling an Indiana Jones. Getting frustrated at not being able to cast the spell, and then just whipping out a gun and shooting the practice dummy.