How'd he do it?

So Ethan is sleeping better at night but naptimes are horrible. Poor thing just screams when I lay him down or rock him. It seems like the only way to get him to nap well is in his swing. Yesterday afternoon I rocked him for a bit then put him down in his crib, let him cry for 20 minutes and then rocked him some more. He finally fell asleep, out of exhaustion most likely. Ironically last night I put him in his crib at 8:00 pm, fully awake. He quietly fell asleep and slept straight through until about 6:30 this morning. That made me happy. This pic is him in his crib before the 20 min of crying. He took off his own pants!!! I have no idea how he did it but I put him in there with pants and 10 min later I came back and they were off!