From a controllers point of view.... oups.... runway closed for some time.
With the number of operations, and adding in winter conditions, this is what happens sometimes, and the reason safety zones are established.
On another note, I've been doing run ups on the runway, which is normally an absolutely nono... simply because the conditions on the taxiways and aprons didn't allow for it.... aircraft would start skidding when adding power. I've even seen slow taxiing aircraft being swung around in gusty conditions (the conversation was rather fun afterwards).