I drive DH mad because I unplug stuff he's left charging before bed, he thinks I'm overly cautious so will show him your photos OP and thanks for warning others, I'm sorry it happened to you. Also a question for @Sevensins about your post, was the charger actually charging or just still plugged in when you trod on it? Worried now as we do tend to just unplug the device and leave the charger plugged in, can they get hot even when not in use?