Seeing as more fun/dynamic waves are being added lately, I felt like sharing a pair that came to mind while walking.
Whack-a-Chicken
I just realized that an idea like this has been posted before (Whack-a-Chicken), but I can think of another way to implement it.
The wave consists of a row of portals from which chickens will randomly emerge, stay for a couple of seconds, have a chance to shoot, and then go back into hiding (much like in the game Whack-a-Mole). As chickens are eliminated, others will appear (of different types, colours, etc.), and bombs may also appear to help.
The trampoline
This wave consists of a series of barriers mimicking a trampoline, where several chickens would fall from the sky and begin bouncing off it chaotically. It would have a start animation with the dangerous area where the chickens would fall, then the trampoline would sink, finally launching the chickens into the air and ending that animation. Meanwhile, the chickens would jump randomly, but without leaving the trampoline. A bomb could also be included to eliminate groups of chickens (about 30 chickens would fall).
