When you feel compelled to destroy something you have built up. (i'm sure there's some technical term for it)
Like, when you go to the beach and you build a sandcastle. The best part about building a sandcastle is jumping on it and watching in sink into the sea.
-Celia grew her nails and then bit them all off! Boy did it feel good.
-Mary grew her hair really really long then cut it all off! She was so happy.
-Janice wrote an entire novel on paper then threw it in the fire. What a laugh.
All these people are enjoying the sandcastle complex.