Is that happening to anyone else.
On page 53 of the Bionic Manual:
In the unlikely event that your smartphone stops
responding to touches and key presses, try a quick
reset. Remove the back cover and battery (“Assemble &
charge” on page 3), then replace and switch your
smartphone on as usual.
Evidently this will happen throughout the life of the Bionic if they decided to put it in the manual. Perhaps as updates come (either to the OS or an app that's causing the problem) there'll be less, but it's expected.
And before you ask; on page 55 of the Razr manual it says to hold the Power and Volume Down for 10 seconds in case it happens.