INT on a DP?

[steveshane67]

this situation happened the other night.

ASA slowpitch
1 out runner on 1st

groundball to 3B, throws to 2nd, gets the force out, its gonna be a close play at 1st bc the 2B isnt good and theres a fast runner. The 2B then does a little crow hop type move directly towards 1B (moving about 5' down the basepath), in the mean time, the runner, who already had been retired, continues running (about 2-3 steps after the force at 2nd) and bumps shoulders with the 2B. At the time of the shoulder bump, the 2B had his arm cocked, ready to throw, the bump knocked him off balance, and by the time he regrouped his balance, the runner was basically at 1B, so the 2B held his throw.

Whats the call if any?