sooooo.
anyone else want to admit that they don't know the difference between "practical" and "impromtu"?
Practical is a subjective term. Impromptu is an
objective term. We use a very strict definition of impromptu - which is why we don't describe Crush as impromptu by any means. By dictionary definition, impromptu means "done without previous preparation." If you're asked to make a toast at a wedding and have nothing prepared, then your remarks could fairly be described as impromptu. In magic, I would define it as much the same. If you can grab any deck of cards (or other object) and immediately do the trick without preparing or setting anything up beforehand, it's impromptu. Some examples? Sinful by Wayne Houchin, Jacob's Ladder by Daniel Garcia, Believe by Joel Paschall, Pressure by DG + DW.
Practical is a subjective term in that what one person sees as practical, another person may think not. In high school, I used to perform Healed and Sealed almost every week. I would run to the restroom, set it up, and do it all the time. The setup took about 2 minutes for me to complete. Reactions were crazy. This was a practical effect for me. For other people, they could complain that you have to set up every single time you perform it, it doesn't reset instantly, and you ruin a can. I would call those people crazy, but to each his own. For me, it was a winner.
Crush includes two methods in an effort to be as practical as possible for as many people as possible. For those that perform in a controlled environment where use of a gimmick would be possible, you have that method at your disposal. For those that perform - like me when I was in high school - in a more off-the-cuff, less prepared environment, there is the no gimmick method. The result is that you can perform this effect in a variety of scenarios. It is, however, not impromptu.
All magic effects have limitations. Unless you're a miracle worker, every effect you ever buy or learn or perform will have its limits. The key is to find those effects that are practical for the environments you regularly perform at, whether that is at school, at work, at parties, on stage, on television, or on the street. For me, Crush is a winner in that department.