Idea Ninja's Eggs-to-projectile collisions

I had an idea floating around in my head for a while that helps improve egg's usefulness while being balanced by having powerful effects while requiring luck and skill to pull off. To put it shortly I'm interested in adding collisions effects whenever a ninja's egg comes into contact with any type of hostile projectile. whether it be a simple tnt blast that damages all players caught in it's radius or perhaps an AOE effect that affects everyone in it's radius while it's effect is determined by the other projectile (Examples like Medic's web collision would explode into webs being thrown into random directions or when an engineer turret's arrow collides near the turret, it gets stunned or takes massive damage to it's current ammo gauge (or whatever you want to call it.)
Now this is only a basic idea but I decided to post it to see what you think of the general idea in itself and if it's worth looking into. Anyways thanks for reading.

 

I'm not exactly referring to just turning all projectile collisions into an aoe effect of what they are, some like your example seem a bit simple and out of place. (not to mention that would be rather annoying.) I'm suggesting more creative effects in situations like these. As to what they are, I haven't really decided yet due to being more interested in seeing the community's thoughts on the main idea, feel free to provide any if you so desire.