So I'd like to draw everyone's attention to this paragraph:
The normal procedure when a student miscasts is to stand back and pray, but recently you've done a fair bit of reading and thinking on the topic of unruly Shyish and you have no fear of Dhar. As the curdling energies within her start to concentrate in her jaw and reality begins to fray, you reach out and press your hand against her cheek, your will unable to prevent the magic from rebelling but able to at least command where it goes. As two awestruck students watch, you tear the miscast spell from Gretel's head and clutch it in your fist, where it immediately comes under the influence of Dwarven Runecraft and ignites into sullen purple flames.
This could just be considered a dispel, but from the fact that it is not common practice I suspect it is a little more. Mathilde commanded exploding Shyish to manifest in her fist not in the journeyman's jaw. The fact that she can do this as an improvisation has interesting implications for the indirect casting.