If you are going to build one of these with the clear intent of sticking a firecracker in it and seeing what happens when that goes off after you have tossed the plane into the air, remember.
After lighting the fuse, don't stand there with the model by your face like an old-time quarterback waiting to have his picture taken. In fact, the chances of perfectly timing the mid-air explosion are remote. So maybe go for an on-the-ground blast.
Or better yet, don't do it at all.