I have just got myself a580EX II Speedlight and some special effect gels from Honl. I was playing with them yesterday but when I had my strobe on full power it burnt the gel! A little wisp of smoke came off the gel and sure enough there was a scorch mark on the gel. Is this normal? Is it only because I used it on full power that this happened or should I expect this to happen all the time? I don't see professionals gels in videos smoking so I must be doing something wrong.