A .22 LR bul­let fired from a wimpy hand­gun:
0.0026 kg trav­el­ling at 320 m/s
Momen­tum: 0.83 kg*m/s

A Scott John­ston plus bicy­cle cruis­ing at 25 MPH:
71 kg trav­el­ling at 11.18 m/s
Momen­tum: 793.78 kg*m/s

You are an old lady cross­ing the street. Which would hurt more?