A strange flapping noise.

Quite why I played golf on one of the hottest days of the year is beyond me. Anyways, I did it, was enjoyable too, except, that it was so so so so hot and got worse as the round went on. Then, five holes from the end, felt a strange flapping sensation under foot, that's ok was just the heel being a bit loose, can glue that up when I get home, then it got worse & the whole sole fell off. D'oh ! At last finished, had a feel cold ones and sat by the air con before heading home. Just couldn't believe the heat and as for the golf shoe, grrr.