When put together, slipping and rolling can be an effective way to block and counter 1-2 combinations. If successfully performed, it will leave you in an excellent position to counter attack.
The Slip And Roll Step 1: Get into your striking stance facing your opponent. Step 2: When your opponent throws a jab, slip it, and anticipate the hook by rolling. Step 3: If performed correctly you will have dodged the combo successfully and will be in a good position to counter.