1.
To bowl someone over means to push into them and make them fall to the ground.
The only physical risk I ran was being bowled over by one of the many joggers...
Some people had to cling to trees as the flash flood bowled them over.
= knock over
PHRASAL VERB: be V-ed P, V n P (not pron), also V P n
2.
If you are bowled over by something, you are very impressed or surprised by it.
Like any tourist, I was bowled over by India.
...a man who bowled her over with his humour and charm.
PHRASAL VERB: be V-ed P, V n P, also V P n (not pron)