Seth won't stop

Standing on the couch, walking, and jumping..... I don't know what to do.
I ask him to stop and he laughs, I put him down on the floor and he climbs back up as fast as he can while laughing. I make my face blank and ask him to sit down and he laughs....
I guess I'm just going to ignore him since its a game to him. .....
Hopefully he doesn't get seriously injured.

    Tristen is in that phase. He hurt himself pretty bad last week. I send him to time out but if I don't do it every time then he doesn't believe me. It hasn't stopped yet but it's gotten a little better. The only thing that has gotten him to not laugh about it is the time out.
    About Jasmine
    Current: Eugene, Oregon
    Birth: April 15
    On since: May 3, 2014
    Looking for mommy friends!