That sooo happened to me today. Mine got delivered this morning and coincidentally we bd'ed this morning so decided to try it out. Getting it in was soo easy (even though i didn't do the downward motion and hence missed some semen) but when i had had enough and was ready to take it out i couldn't! I tried so hard not to panic and all i thought of was explaining myself at a&E....It was slippery messy, though i managed to get the rim it just didnt budge. It took me 10 secs to put it in and nearly 15mins to take it out. It does take getting used to. I'll give it one more go and see.