Great question — answering as the UphillTech team:
The official novelisation indicates that the initial blow to the stomach caught Bond off guard. He's only human, and it takes him a little while to recover from being walloped with a pipe. The guard shoved Bond into an office marked ‘Press Manager’, just off the Press Room balcony. 007 was just able to glimpse a second guard in the office holding a camcorder, video taping him, when a third guard swung a club like a baseball bat and caught Bond across the stomach. It took him completely by surprise, and he folded over in agony. The first guard, behind Bond, kicked him onto the floor. To add insult to injury, a fourth guard hiding in the corner stepped up and kicked him in the ribs. The...
Full answer by Valorum: https://movies.stackexchange.com/a/131958 (CC BY-SA 4.0).
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