WTH! Benjamin Marauder Loaded all 10 Pellets from the Magazine into the Barrel!

So I let my cousin use my Marauder .177 and he kept cycling the bolt to try and get the rifle to fire and if what he is telling me is right - I think he actually somehow loaded all 10 pellets into the chamber! Is this even possible? So the bolt will pull back but it feels like it is already cocked, but when you pull the trigger it doesn't release what I am assuming is the hammer trigger sear. Has anyone else ever seen this before? I am assuming I can find a small rod to shove the pellets out the breech side, but any idea of what is going on with the rifle not firing but feels like it is cocked since the bolt pulls all the way back without any tension? Thoughts?
 
My son did that with my .22 Marauder but he only got 4 pellets into the barrel and on mine what happened was he didn’t pull the bolt all the way back, you know that last 1/8 - 1/4 of a inch that can be hard to do, so he just pulled the bolt back again letting the mag cycle to the next round and push in another pellet, it took me a bit but after tearing it down some I ended up getting the four pellets out using my 22 cleaning rod and tapping it to knock out the pellets, it wasn’t easy but eventually I got them all out, I loaded a pellet the correct way and it shot just fine, needless to say he did the same thing two more times but with only 3 pellets, the last time I thought the barrel was going to be shot, the pellets were wedged pretty good but again I got them out and it still works ok, the rife is now a leaner next to my safe.

Needless to say he no longer shoots the Marauder,I let him shoot one of my other airguns with a side lever, some people just can’t get the hand of pulling the bolt all the way back, he had a hard time with my BT65SB also so he no longer shoots that one, he really likes my .25 Wildcat hahaha.