get ahead of oneself

Montgomerie suspected he was getting ahead of himself. "I think I am thinking about next week too much," he said.

Channel 4 News's Samira Ahmed rather got ahead of herself when she told viewers on Saturday afternoon that Liverpool had beaten Chelsea in the FA Cup semi-final-even thought it was still 90 minutes away from kick-off.

She talked so excitedly that she got ahead of herself and looked bewildered and cried out, "What was I saying?"