Hiding evidence

My 2 year old son knows what he can and can’t do like for example he dumped his milk all over the table and when I seen what he did he put both hands on the table and started wiping it like it was gonna disappear, when he finds a coin in the couch he’ll put it in his mouth and when I notice he’s chewing on something he’ll take it out and chuck it across the room like I didn’t see it all. Well.. today he took his diaper off, shit on the floor while I was making his sister a bottle and when I went to grab him for a snack he grabbed his poop and ran and flushed it down the toilet 😂😂😂 I guess potty training starts this weekend