Can a hamster get itself stuck in something?

[MissJeliza]

I've been on the look out for things to use as little houses for my hamster cage,
I want to do a halloween themed cage this year and while I was on pound land I saw some really cute candle holders that are pumpkins and ghosts and skulls
They're really cute and have quite large holes and the back that I'm sure a dwarf can get in and out off,
But I'm not sure about a syrian, mines quite big away but I've seen her get in some small holes before,

I'm most concerned about getting a house that's got a big enough hole in the back but would they get stuck in the eye holes at the front??