Don't try this at home

[Buttons]

Here is a great post on the great website Technic Bricks about things a technic builder should NEVER do!

Enter if you dare!!!

[CP5670]

I used to occasionally get into these situations when I was younger. In the first example there, it is still possible to bend back the axle connectors and have them snap out of the axles if you pull hard enough.

The worst assemblies I've done though were in an official set, involving this and this in 8448. These are the only pieces I have never managed to separate no matter what I tried, and they have remained stuck together for 9 years now.

[Guss]

humm .. already did things like that, you just have to push the axle with a long axle, and it'll be fine^^

[Pencoin]

I've done the worst! Old Bionicle head, insert Onua Claw into the back of the mouth then push an axle through.

[Ras_Al_Ghul]

I made the mistake of putting a axle joiner in a 4 x 6 technic brick and pushing 2 stud axles in it. I ended up cutting the joiner with a hack saw to get it out.