No need to rely on stronger jutsus. You can always make very good combinations with low ranked jutsus as well. The type of combos are very flashy and people love seeing stuff like that in fights. It's inspiring because it makes other try to think of different combos too and it's also helpful and useful for yourself in the fight, obviously.@Bold Wow it didn't click me it could be used that way. I was waiting to learn a few more jutsus before I tried to think of combinations.
This is a trickery type of Genjutsu. The user is basically throwing a bomb but the opponent instead sees a clone approaching. If my opponent uses this technique I can deduce it is a Genjutsu when I see the clone approaching but I cannot see its shadow upon the ground, as all tangible things cast shadows. Also if I cannot hear the approaching clone's footsteps then its not real but an illusion. A real clone running might also leave its foot marks on the ground depending on the terrain. If there are no foot marks where the clone stepped then its an illusion. I can get out of it by chipping my finger.
Excellent, I love the marks on the ground deduction. It's possible that the clone just sort of "glides" across the ground as it's running to you while, for example, not raising the dust that is on the ground or not making splashes while running on the water. However, the real thing with this genjutsu is the bomb. Usually, illusions don't do any damage but this one does because of the bomb, so you have to deal with it as quickly as possible. Chipping your finger would only remove the clone from your vision but then you would face the reality and see the bomb flying at you. Don't forget to deal with that one too.